May be of interest to Mobil 1 users.

[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

[-=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]

Originally Posted by 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

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

[XfireZ51]

Originally Posted by 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

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

[-=Jeff=-]

http://www.zr1specialist.com/HAT%20W...5%20Engine.pdf

[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]

Originally Posted by DRM500RUBYZR-1

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