May be of interest to Mobil 1 users.

[TX '90 ZR1]

I just saw a flyer from "Auto Zone" parts store.
They have Mobil 1 on sale thru 12/25/17. Looks like you get 5 quarts and a filter for just shy of $30.00.
Ad says it is good for any of the synthetics including high mileage and does not specify a limit.
Might not be able to use the filter, but 5 Qts for 30 bucks sounds pretty good to me.
I am not associated with Auto Zone, in fact rarely go in the store.
Y'all have a great one !! :cheers:

[Ccmano]

That’s a good deal if you include the filter. I just picked two 5qt jugs of Mobile One 10w-40 High Milage for $25 a piece at Walmart. That after I missed the sale at $19. :censored: Got the filter from NAPA a Wix 1324 for $7.
H
:cheers:

[XfireZ51]

I just switched to Mobil 1 Extended and got it from WalMart at $25/5 quarts.

[George Maz]

Amsoil 10w-30 blended with Walmart Mobil High-mileage, Napa Gold, ...sometimes Amazon Wix 2-pack.

24 hr oil change method, hot, neodymium magnet on filter, drain catch can, lube door hinges.

It was posted recently Mobil reformulated and lowered the additives, so I'm going full AMSOIL 10w-40 from now on.
High Mileage was the recommendation, the Extended Performance did not meet spec ...but it has the "gold" cap. I wrote Marc about this to get clarification.

[George Maz]

6865

[Gunny]

3 items that may be of some interest ...

Mobil 1 10W40 High Mileage - zinc levels are close to the recommendations for the LT5 (Amsoil 10W40 AMO is closer but not always readily as available)
Once a year (maybe more often) Mobil 1 has a rebate promotion - $12 back for 5-qt jug as well as other rebate combinations. The last promo offer ended 10/31. If you caught the sale price of $20.00 and used the rebate you could have bought 2 5-qt jugs for $16.00 (max 2 rebates per household). Sometimes WallyWorld posts the rebate forms near the oil; otherwise, you can Google Mobil 1 rebates, find the current promo, download the pdf, copy your receipt, mail it in, and wait for the mailman to deliver your rebate.
AC Delco filters prices dip close to $5.00 each (sometimes lower) at Amazon a couple times a year.

[rush91]

3 items that may be of some interest ...

Mobil 1 10W40 High Mileage - zinc levels are close to the recommendations for the LT5 (Amsoil 10W40 AMO is closer but not always readily as available)
Once a year (maybe more often) Mobil 1 has a rebate promotion - $12 back for 5-qt jug as well as other rebate combinations. The last promo offer ended 10/31. If you caught the sale price of $20.00 and used the rebate you could have bought 2 5-qt jugs for $16.00 (max 2 rebates per household). Sometimes WallyWorld posts the rebate forms near the oil; otherwise, you can Google Mobil 1 rebates, find the current promo, download the pdf, copy your receipt, mail it in, and wait for the mailman to deliver your rebate.
AC Delco filters prices dip close to $5.00 each (sometimes lower) at Amazon a couple times a year.






I stocked up on the AC Delco filters from Amazon. Great price for a good filter. Thanks for the heads up on the rest!!

[Paul Workman]

Hadn't heard that about Mobil 1 cheaping out on the ZDDP.:mad: Well, no harm here; never put their stuff in my Z anyway. (I buy my Amsoil 10-40 from Marc Haibeck...because I CAN and we gots ta support the local sheriff, doanchaknow...:p )

Been having my oil changed (DD F150, etc.) for 18 years at a oil change joint. I change my own on the Vettes, and the oil joint used to drain my 5 gal Gerry can for free.

NOW they want $1/gal to accept used oil.:mad::mad: Anyone else have this problem??

Sorry....don't mean to hijack the thread.

[andersra]

Hadn't heard that about Mobil 1 cheaping out on the ZDDP.:mad: Well, no harm here; never put their stuff in my Z anyway. (I buy my Amsoil 10-40 from Marc Haibeck...because I CAN and we gots ta support the local sheriff, doanchaknow...:p )

Been having my oil changed (DD F150, etc.) for 18 years at a oil change joint. I change my own on the Vettes, and the oil joint used to drain my 5 gal Gerry can for free.

NOW they want $5/gal to accept used oil.:mad::mad: Anyone else have this problem??

Sorry....don't mean to hijack the thread.

My town will take the oil at their recycling center. I brought in a 5 gallon jug full of used oil paid nothing.

[Mystic ZR-1]

I gotta ask...
How come so many use 10W-40?
The oil cap on the engine and the owners manual say 10W-30?
Would like to think the GM engineers knew what they were talking about...
(but, sometimes I wonder?)

[George Maz]

Marc's recommendation 10w-40 for increased film strength.

Paul, if I lived anywhere near Haibeck Automotive I'd probably hang around the shop all day long, just to gain ZR-1 knowledge.

[Paul Workman]

Marc's recommendation 10w-40 for increased film strength.

Paul, if I lived anywhere near Haibeck Automotive I'd probably hang around the shop all day long, just to gain ZR-1 knowledge.

Yeah, one always learns new stuff with a visit to "The Specialist". Just a few minutes more to the east, and Pete's shop is there. Or a few minutes west, and Dominic can be found fussing with his dataloggin, and Bob Gillig just a few minutes away....

Yep! This is ZR-1 country. We're not called the "FBI" for nothing! Some of the very best meet here for pizza several times a year! It's an honor to live here in such a concentration of talent!:thumbsup:

[rush91]

Yeah, one always learns new stuff with a visit to "The Specialist". Just a few minutes more to the east, and Pete's shop is there. Or a few minutes west, and Dominic can be found fussing with his dataloggin. AES is near by, and Bob Gillig just a few minutes away....

Yep! This is ZR-1 country. We're not called the "FBI" for nothing! Some of the very best meet here for pizza several times a year! It's an honor to live here in such a concentration of talent!:thumbsup:


Jealous lol!!! But that is one of the reasons I bought my Z, was the incredible community of people.....I'm going to have to drive up for a pizza night this summer.

Sent from my XT1585 using ZR-1 Net Registry mobile app (http://r.tapatalk.com/byo?rid=90383)

[Ccmano]

Yeah, one always learns new stuff with a visit to "The Specialist". Just a few minutes more to the east, and Pete's shop is there. Or a few minutes west, and Dominic can be found fussing with his dataloggin. AES is near by, and Bob Gillig just a few minutes away....

Yep! This is ZR-1 country. We're not called the "FBI" for nothing! Some of the very best meet here for pizza several times a year! It's an honor to live here in such a concentration of talent!:thumbsup:

Yup, that’s the one (and only) thing about Chicago I miss. Great bunch of people and great pizza! Ok, two things...
H
:cheers:

[SBAquaLT5]

I was trying to do a lot of research myself being a "new" Z guy... I read the discussions and articles on the "Mobil 1 High Mileage" having higher ZDDP, however when I went to the Mobil data site, it's showing the same as the other regular 10w30... I'm wondering if they've pulled the higher ZDDP out of the "High Mileage" as well.

The date on this document is March 2017.

https://mobiloil.com/~/media/amer/us/pvl/files/pdfs/mobil-1-oil-product-specs-guide.pdf

[Ccmano]

I was trying to do a lot of research myself being a "new" Z guy... I read the discussions and articles on the "Mobil 1 High Mileage" having higher ZDDP, however when I went to the Mobil data site, it's showing the same as the other regular 10w30... I'm wondering if they've pulled the higher ZDDP out of the "High Mileage" as well.

The date on this document is March 2017.

https://mobiloil.com/~/media/amer/us/pvl/files/pdfs/mobil-1-oil-product-specs-guide.pdf

Interesting... looks like they changed it yet again.
H

[-=Jeff=-]

I use Amsoil AMO 10w40 in my Z.. I use Amsoil OE oil in our regular cars

[XfireZ51]

Interesting... looks like they changed it yet again.
H

Oh great! I just switched to it.:neutral:
However, I am noticing an appreciable reduction in oil consumption.

[-=Jeff=-]

Oh great! I just switched to it.:neutral:

Just buy Amsoil and be done with it ;)

[rush91]

I use Amsoil AMO 10w40 in my Z.. I use Amsoil OE oil in our regular cars

I also run Amsoil 10w40, which I'm in need of changing btw....but I'll order it online, and it's here in a day or two. Good stuff.

Sent from my XT1585 using ZR-1 Net Registry mobile app (http://r.tapatalk.com/byo?rid=90383)

[-=Jeff=-]

I also run Amsoil 10w40, which I'm in need of changing btw....but I'll order it online, and it's here in a day or two. Good stuff.

Sent from my XT1585 using ZR-1 Net Registry mobile app (http://r.tapatalk.com/byo?rid=90383)

Yep, I order online and then go and pick it up at lunch usually (I am close enough to the Chicago location)

[XfireZ51]

I guess the question is how many of us have unknowingly continued to use Mobil1 with no apparent detrimental effect?

[George Maz]

#1727 left Marc's shop with Amsoil 10w-40, everything good. For the next oil change I did a blend of Amsoil & Mobil 10w-30...noticeable occasional chain rattle, in addition to finding out additives are reduced now.

I like to do my research one time, find the best recommendation and move on. Been using Mobil1 in everything, but the ZR-1 getting full Amsoil from now on, period.

[Dynomite]

I like to do my research one time, find the best recommendation and move on. Been using Mobil1 in everything, but the ZR-1 getting full Amsoil from now on, period.

I use Mobile 1 engine oil in everything else except the ZR-1s just like George :thumbsup:

I use Mobile 1 Oil Filter and Mobile 1 Differential Fluid in the ZR-1s, PERIOD :p

I use Amsoil 10W-40 in the LT5 engine.
I use Castrol 10W-60 in the ZF S6-40 (Black Label or Blue Label) Transmission.

See What Fluids to use in the ZR-1 (http://forums.corvetteforum.com/c4-zr-1-discussion/3005470-tech-info-lt5-modifications-rebuild-tricks-500-hp-4.html#post1581690522)


https://cimg8.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/220x400-1/80-amsoil10w_40oil_zps1b85b817_1__41d3919364091164299 d0398c88b0200970babe8.jpg........https://cimg3.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/220x400-1/80-twscastrol_1_1__c1196a14dcbe3d2d9a30ba7bb55af67e39 289f75.jpg.https://cimg4.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/220x400-1/80-d3ded310_224a_4048_a7ae_97472f98f64e_1__661c7e57ee 53c43aad9a807cd44d0fe6438cbb72.jpg

https://cimg7.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/800x600-1/80-353a8770_2463_4a3d_bd53_860920b2b618_1__215baaf45f a8310b57b69078bd80040f5003d62d.jpg

[TX '90 ZR1]

After doing some research and pondering everyone's input, I think I have decided to go with Marc's recommendation on the Amsoil. After all, he is one who should know.
No more often than we change oil & filters, the cost difference if actually insignificant if it is the best for our cars.
I also suggest we should order from Marc and return all the support he gives to the ZR 1 community.
That's what I am going to do when I do the service on the car this winter.

:Eagle:

[Ccmano]

As good as Amsoil is I have a hard time with the price differential to Mobile 1. I can get M1 for just over $5.15 a quart plus tax. Amsoil is $11.70 a quart plus tax and shipping. Forgetting about the tax and shipping for the moment 10 quarts is $51.50 for M1 and $110.70 for the AMSOIL. I can add a bottle of zinc addative for $10 to the M1, have an even higher zinc level and still be $50 ahead vs AMSOIL on every oil change. With the exception of zinc (zddp) Mobile 1 is still a great product. Unless someone can convince me otherwise I’m staying with M1 even if I have to include the zinc addative.
H
:cheers:

[XfireZ51]

I believe Pete is using Mobil1 w/o any additives and so far no issues.
I’ve decided on the Mobil1 Extended 10W-40. And now that u mention it,
haven’t noticed much in the way of startup chain rattle.

[-=Jeff=-]

I pay less than $11 per quart for Amsoil, but I am a preferred customer.. and while I don't pay $5 per quart, I do buy for all my cars.

Where do you guys buy ZDDP from?

[-=Jeff=-]

Amsoil ZDDP Info attached

[Ccmano]

I pay less than $11 per quart for Amsoil, but I am a preferred customer.. and while I don't pay $5 per quart, I do buy for all my cars.

Where do you guys buy ZDDP from?

Summit... I’ll bet regular auto parts stores carry it too.

https://www.summitracing.com/nv/parts/crn-99003-1

H

[rush91]

I pay $11 a quart for the Amsoil, and I believe I get it from a guy a town over, who is a whole seller....I'm a preferred customer as well. And I notice none to any chain rattle when I have a fresh change...

Sent from my XT1585 using ZR-1 Net Registry mobile app (http://r.tapatalk.com/byo?rid=90383)

[-=Jeff=-]

Being a preferred customer I buy direct from Amsoil.. ~$8 per quart

I buy OE Amsoil for my other cars at ~$5 quart

Wondering if the Z-Rod oil might be better than the AMO for the amount I drive and having to store it each year. cost is a bit better than the AMO for the Z-Rod

[DRM500RUBYZR-1]

As good as Amsoil is I have a hard time with the price differential to Mobile 1. I can get M1 for just over $5.15 a quart plus tax. Amsoil is $11.70 a quart plus tax and shipping. Forgetting about the tax and shipping for the moment 10 quarts is $51.50 for M1 and $110.70 for the AMSOIL. I can add a bottle of zinc addative for $10 to the M1, have an even higher zinc level and still be $50 ahead vs AMSOIL on every oil change. With the exception of zinc (zddp) Mobile 1 is still a great product. Unless someone can convince me otherwise I’m staying with M1 even if I have to include the zinc addative.
H
:cheers:



Let me start by saying that I am not a chemist.
I too used to add a bit of ZDDP to my Mobil-1.
In a protracted discussion on oil, likely on the Corvette Forum, someone presented a very sound and incontrovertible argument against doing it.
Not enough, and you risk engine damage.
Too Much; You ensure engine damage.
I had used Mobil -1 exclusively since 1976..... but after that day I switched.
I still use Mobil -1 in all of my newer cars, but Mobil deserted our older cars by changing the formulation, so I now have deserted them for the ZR-1 and other non roller cammed engines.


Amsoil certainly has what is needed, and you cannot go wrong with using it. I do on occasion.


However I also use Brad Penn 10w30 Partial Synthetic High Performance Oil. It provides the needed Zinc / Phosphorous and ZDDP.
Brad Penn is the newer name for Kendall GT which I used as a youngster.
It is made in Bradford Pennsylvania at one of the oldest oil wells in the country.
It is also $8.00 a quart.


I no longer buy, use or recommend adding ZDDP unless you have an advanced chemical engineering degree, and proven experience in blending an additive package that does not conflict with it's own ingredients.


Buy Amsoil or Brad Penn and then use your brain for simpler things like world peace or assembling rockets.
Marty

[Z51JEFF]

Amsoil for me.

[Ccmano]

This oil discussion thread and discussion of zddp begs the question...

While low zddp levels in modern oil is a known and verified source of cam and flat tapped wear in older design engines, has there ever been a verified case where this happened on an LT5 engine?

I’ve been around the LT5 engine for going on 10 years now and I can’t honestly say I have ever heard of one. Has anyone ever asked Haibeck or Cory Henderson if they have run across one.

Just curious....
H
:cheers:

[XfireZ51]

This oil discussion thread and discussion of zddp begs the question...

While low zddp levels in modern oil is a known and verified source of cam and flat tapped wear in older design engines, has there ever been a verified case where this happened on an LT5 engine?

I’ve been around the LT5 engine for going on 10 years now and I can’t honestly say I have ever heard of one. Has anyone ever asked Haibeck or Cory Henderson if they have run across one.

Just curious....
H
:cheers:

Good question Hans. I know of those that don’t add ZDDP w/o apparent consequences.

[-=Jeff=-]

http://www.zr1specialist.com/HAT%20Web/articles/Modern%20Motor%20Oil%20and%20the%20LT5%20Engine.pd f

[XfireZ51]

Jeff,

Marc's comments regarding Mobil1 High Mileage reference the Mobil Oil Chart from 2011. As of 2017, the zinc/phos content is now 800/900 which he states is an unacceptable level.

[USAFPILOT]

I read on this forum somewhere that the Mobil 1 High Mileage is better for our car than the Extended Performance. Is this still true?

[Ccmano]

Let me start by saying that I am not a chemist.
I too used to add a bit of ZDDP to my Mobil-1.
In a protracted discussion on oil, likely on the Corvette Forum, someone presented a very sound and incontrovertible argument against doing it.
Not enough, and you risk engine damage.
Too Much; You ensure engine damage.
I had used Mobil -1 exclusively since 1976..... but after that day I switched.
I still use Mobil -1 in all of my newer cars, but Mobil deserted our older cars by changing the formulation, so I now have deserted them for the ZR-1 and other non roller cammed engines.


Amsoil certainly has what is needed, and you cannot go wrong with using it. I do on occasion.


However I also use Brad Penn 10w30 Partial Synthetic High Performance Oil. It provides the needed Zinc / Phosphorous and ZDDP.
Brad Penn is the newer name for Kendall GT which I used as a youngster.
It is made in Bradford Pennsylvania at one of the oldest oil wells in the country.
It is also $8.00 a quart.


I no longer buy, use or recommend adding ZDDP unless you have an advanced chemical engineering degree, and proven experience in blending an additive package that does not conflict with it's own ingredients.


Buy Amsoil or Brad Penn and then use your brain for simpler things like world peace or assembling rockets.
Marty

Certainly a valid argument Marty. But I’m not sure if I buy into it 100%. Zddp additives are now made in dosages designed by the manufacturer to treat certain quantities of oil. Sure you can go crazy and add too much, but that’s the case with anything. While I am certainly not a chemist the question comes down to whether you trust the chemists at the additive company. I doubt these companies would stay in business if their products caused damage when used as prescribed.

This one for example is designed for exactly the situation we are discussing. It is designed to treat 4-5 gallons of regular or synthetic oil and is designed to be added every oil change.

https://www.summitracing.com/nv/parts/isk-zddp

So, sure you can screw things up by not following directions or if you want to play it super safe you can just buy Amsoil (in this case). To each his own I suppose.

Have a great Holiday Marty
H
:cheers:

[DRM500RUBYZR-1]

It's soon to be Friday night, and snowy for some of us.
Grab a good bottle of Cabernet, Scotch, or a twelve pack,
and spend some time reading this:


https://www.corvetteforum.com/forums/c4-zr-1-discussion/2507424-oil-choice-for-your-lt5.html


Having re- read it, I may just go back to my trusty old Mobil-1.


I neither endorse, nor condemn any of the responses in the thread, even mine.
Good Reading, but focus on post #22


Marty

[lfalzarano]

From Marc’s write-up, Amsoil AMO 10W-40 is the best to keep your LT5 running for years to come. Don’t take a chance and cheap out on your car.


Sent from my iPhone using ZR-1 Net Registry (http://r.tapatalk.com/byo?rid=90383)

[Ccmano]

It's soon to be Friday night, and snowy for some of us.
Grab a good bottle of Cabernet, Scotch, or a twelve pack,
and spend some time reading this:


https://www.corvetteforum.com/forums/c4-zr-1-discussion/2507424-oil-choice-for-your-lt5.html


Having re- read it, I may just go back to my trusty old Mobil-1.


I neither endorse, nor condemn any of the responses in the thread, even mine.
Good Reading, but focus on post #22


Marty

Great find Marty. Everyone should read post #22 in that thread. My personal opinion is that for the LT5 the zddp Issue is overblown. Especially in light of the fact that there is no imperical evidence that LT5 motors have been damaged from current zddp levels. The 181k mile Z in my garage (a one owner dealer serviced car) is evidence that regular maintenance with a quality oil, probably Mobile One, is what these engines need for a long trouble free mechanical life.
H
:cheers:

[XfireZ51]

Let’s say I know a certain Greek w re-ground cams that doesn’t add ZDDP.
The seat pressure for our valves vs pushrod motors is very different.

[SBAquaLT5]

Didn't mean to hijack the thread.. It's great reading the thoughtful comments from here! Everyone is well read and cares about their car... I took the good suggestion of having a glass of wine, but it's snowing ash here instead of the water stuff..

My 2 Cents

The low seat pressure on the valve followers is a legitimate argument, and so is the minimal damage from regular synthetic.
Those who've run Mobil1 for years have probably only subjected the engines to reduced ZDDP recently as the blends have become less and less. The air cooled Porsche community also shares the same concerns and most run VR-1 or Brad Penn. I wouldn't expect to visually see a difference in the cam lobes from 900 vs 1200 ppm for (tens)thousands of miles on our cars, but I always subscribe to the "ounce of prevention" side of things.

Lately I'm more curious as to why 10w40 is suggested over the 5w30. Historically thicker oil is used in severe conditions due to reduced viscosity at high temperatures, especially true of old petroleum oils. However our cars hold 9 qrts of fancy synthetic oil and have oil coolers. They look to be pretty stable on oil temp. I could only guess more shock protection for timing chains, or machine tolerances/shear protection...? I use Mobil1 in a lot of vehicles too

[Paul Workman]

Oh great! I just switched to it.:neutral:
However, I am noticing an appreciable reduction in oil consumption.

Ummm...was the consumption down due to a change of oil brand or the repair of that broken ring do you think?

(Had to ask!)

[XfireZ51]

Ummm...was the consumption down due to a change of oil brand or the repair of that broken ring do you think?

(Had to ask!)

Paul,

When the motor was first put back together, it was filled w my regular oil
Castrol GTX DIESEL because of its ZDDP content. However, Pete strongly suggested I swap that out to a synthetic, so I decided on Mobil1 High Mileage
based on recommendations here.
Checking oil after 4-500miles of driving, the consumption appears to have slowed down noticeably. Down about 1/2 qt.

[Dynomite]

While low zddp levels in modern oil is a known and verified source of cam and flat tapped wear in older design engines, has there ever been a verified case where this happened on an LT5 engine?

I’ve been around the LT5 engine for going on 10 years now and I can’t honestly say I have ever heard of one. Has anyone ever asked Haibeck or Cory Henderson if they have run across one.

Just curious....
H
:cheers:

Yes On a Low Mileage 1990 :p

Camshaft Wear Aberation on a Low Mileage 1990 ZR-1 (http://www.zr1.net/forum/showthread.php?t=19006)

http://i287.photobucket.com/albums/ll142/dynomite007/A%20Engine%20LT5/CamLobes3m.jpg
http://i287.photobucket.com/albums/ll142/dynomite007/A%20Engine%20LT5/CamLobes2m.jpg
http://i287.photobucket.com/albums/ll142/dynomite007/A%20Engine%20LT5/CamLobes1m.jpg

[Ccmano]

Yes On a Low Mileage 1990 :p


Interesting... This is one of these questions that will never truly be answered. Did this camshaft fail because of the Zddp issue, was it a defective camshaft, was it because of the infamous cold start procedure at the plant in 90’ where cold new engines were reved to redline at startup or simply owner neglect.
We will never know.

Now, show me a dozen of these accross multiple model years and I might be convinced.
H
:cheers:

[Dynomite]

Interesting... This is one of these questions that will never truly be answered. Did this camshaft fail because of the Zddp issue, was it a defective camshaft, was it because of the infamous cold start procedure at the plant in 90’ where cold new engines were reved to redline at startup or simply owner neglect.
We will never know.

Now, show me a dozen of these accross multiple model years and I might be convinced.
H
:cheers:

Well....Now you have heard of one situation (other situations are mentioned in Camshaft Wear Abberation on a Low Mileage 1990 ZR-1 (http://www.zr1.net/forum/showthread.php?t=19006)) ;)
Very Very Few ZR-1 owners ever look under the Cam Covers even though that is possible without removing the engine. Even less of ZR-1 owners remove the LT5. Marc Prolly has the greatest experience looking at Camshafts as he posted in this thread... Camshaft Wear Abberation on a Low Mileage 1990 ZR-1 (http://www.zr1.net/forum/showthread.php?t=19006)

Now....Back to Sanity and a great follower of Marc Haibeck.
I have five ZR-1s which ALL get the same Top End Reconditioning and ALL have the Same Fluid Changes.......and ALL questions I have had for Marc Haibeck and advice by Marc are incorporated in ALL ZR-Is :thumbsup:
I repeat myself here again :sign10:

I use Mobile 1 engine oil in everything else except the ZR-1s just like George :thumbsup:

I use Mobile 1 Oil Filter and Mobile 1 Differential Fluid in the ZR-1s, PERIOD :p

I use Amsoil 10W-40 in the LT5 engine.
I use Castrol 10W-60 in the ZF S6-40 (Black Label or Blue Label) Transmission.

See What Fluids to use in the ZR-1 (http://forums.corvetteforum.com/c4-zr-1-discussion/3005470-tech-info-lt5-modifications-rebuild-tricks-500-hp-4.html#post1581690522)


https://cimg8.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/220x400-1/80-amsoil10w_40oil_zps1b85b817_1__41d3919364091164299 d0398c88b0200970babe8.jpg........https://cimg3.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/220x400-1/80-twscastrol_1_1__c1196a14dcbe3d2d9a30ba7bb55af67e39 289f75.jpg.https://cimg4.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/220x400-1/80-d3ded310_224a_4048_a7ae_97472f98f64e_1__661c7e57ee 53c43aad9a807cd44d0fe6438cbb72.jpg

https://cimg7.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/800x600-1/80-353a8770_2463_4a3d_bd53_860920b2b618_1__215baaf45f a8310b57b69078bd80040f5003d62d.jpg

[Ccmano]

Funny.. here’s a link to a thread I posted on the subject back in 09’. It contains Hibs excellent article on the subject. It concludes that 800 ppm zddp is the minimum requirement for our engine. It also appears I was advocating Amsoil at the time...lol. (or any oil with 800ppm or more).

http://www.zr1.net/forum/showthread.php?t=8057&highlight=Camshaft+failure

To me, at least, the bottom line is we should all use what we are comfortable with. To some that’s the extra protection of Amsoil, others Mobile 1 with or without an addative, I’m sure there are many other options. Ultimately there is no one answer.

Good discussion though...
H
:cheers:

[-=Jeff=-]

So if amsoil amo is 1400 zddp. I wonder if you could blend it with another oil to bring it down to 1000. This would help those with converters still on their car


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[XfireZ51]

Funny.. here’s a link to a thread I posted on the subject back in 09’. It contains Hibs excellent article on the subject. It concludes that 800 ppm zddp is the minimum requirement for our engine. It also appears I was advocating Amsoil at the time...lol. (or any oil with 800ppm or more).

http://www.zr1.net/forum/showthread.php?t=8057&highlight=Camshaft+failure

To me, at least, the bottom line is we should all use what we are comfortable with. To some that’s the extra protection of Amsoil, others Mobile 1 with or without an addative, I’m sure there are many other options. Ultimately there is no one answer.

Good discussion though...
H
:cheers:

Sounds like Hib’s article would find Mobil 1 High Mileage to have an acceptable level of ZDDP.
I didn’t get the impression that Cliff’s link did much to indicate that lack of ZDDP was the cause of lobe wear. And didn’t Marc write that he went ahead and continued to use that cam w/o further issue?:icon_scra

[Dynomite]

To me, at least, the bottom line is we should all use what we are comfortable with. To some that’s the extra protection of Amsoil, others Mobile 1 with or without an addative, I’m sure there are many other options. Ultimately there is no one answer.

Good discussion though...
H
:cheers:

Of all the contributors to this thread and of those who read this thread I would bet only a small handful will ever look at their camshafts :sign10:

Camshaft and lifter failures are like Timing Chain failures......those failures are very very rare and the reasons for the failures are difficult to diagnose.

The LT5 is very very reliable engine and easy to get 100,000 miles or even 200,000 miles on an engine. The Chain guides some times DO wear out and break but even that is rare. Often these failures may be lubrication related.

[Ccmano]

Of all the contributors to this thread and of those who read this thread I would bet only a small handful will ever look at their camshafts :sign10:

Agreed! Or at least not till that ticking sound starts...lol
Happy Holidays
H
:cheers:

[Dynomite]

Agreed! Or at least not till that ticking sound starts...lol
Happy Holidays
H
:cheers:


:D:D

Merry Christmas :cheers::handshak: