Simple oil question? - ZR-1 Net Registry Forums

Roadster · 03-08-2015

I have 61,800 miles on the 94, is there any concern using MOBIL 1 high mileage 10W-40 for the LT-5, even though it is formulated for 75000 miles and above?
Right now i have MOBIL 1 5W-30 in the engine. I know that the Amsoil AMO 10W-40 seems to be the preferred choice for our engines, but am curious about the oil in question.
Thanks for any info.....

edram454 · 03-08-2015

best oil you can use because of the high zinc content. it provides lubrication to the cam chains and it can be bought at any walmart. it is the best and its what I use.

ed ramos #3028

Roadster · 03-08-2015

Quote:

Originally Posted by edram454

best oil you can use because of the high zinc content. it provides lubrication to the cam chains and it can be bought at any walmart. it is the best and its what I use.

ed ramos #3028

Thanks for the reply Ed, one of my Walmart's did not have the 10W-40, I have two more to check tomorrow. Pep Boys has it in stock but for $39 a gallon. I do have my Pep Boys coupon that gives me either $25 off $100,
$15 off $75, or $10 off $50 for any purchase in the store. So I can use that to bring the cost down and I think on another thread here or CF, that there is a rebate being offered for MOBIL 1 for awhile.
Also reading the label on the High Mileage, noticed that there are sealant additives in the oil to help prevent leaks, hence maybe the 75,000 mile designation. It's not like out engines say ok we are at 75,000 now, and you need sealant additives, because you are going to start to leak oil. Guess I am being my anal self and over cautious....

I know the oil debate has been beaten to death, but always enjoy other opinions as well......

Gunny · 03-08-2015

Click HERE for a good discussion of oil and the LT5.

Mobil 1 High Mileage is listed as acceptable for the LT5 engine with OE valve springs. Amsoil AMO 10-40 is recommended for the LT5 as it has the optimum zinc formulation. This is why a number of ZR-1 owners use/recommend Amsoil. The M1 High Mileage is readily available at my local wallyworld but I can also get Amsoil from a local farmer who uses it in all his diesel engines ... and his price for the Amsoil is close enough to the Mobil 1 that I'm happy using Amsoil.

GOLDCYLON · 03-08-2015

another vote for Amsoil

efnfast · 03-08-2015

I worry about anything I can buy at Wal-Mart. It just seems to devalue it.

Gunny · 03-08-2015

Quote:

Originally Posted by efnfast

I worry about anything I can buy at Wal-Mart. It just seems to devalue it.

Steve, now you've got me worried that perhaps I shouldn't have applied for the greeter position at our local WallyWorld. They promised me 20% on all oil/filter purchases

edram454 · 03-09-2015

Quote:

Originally Posted by Gunny

Steve, now you've got me worried that perhaps I shouldn't have applied for the greeter position at our local WallyWorld. They promised me 20% on all oil/filter purchases

mobil 1 is mobil 1 whoever sells it. it has a very high zinc content which is what we are looking for because of our cam chains. trust me I was an amsoil dealer years ago and I do love amsoil but why blow more money if I can get a great high zinc synthetic for much less at walmart. I would never skimp on a oil just for price,, quality is always first with me when maintaining my zr1. either one is good.

ed ramos #3028

mike100 · 03-09-2015

I think the reason the high-mileage formulation are advertised for 75000 mi and up is because that's about when the govt mandated warranty for catalyst lifespan expires.

Roadster · 03-09-2015

Quote:

Originally Posted by mike100

I think the reason the high-mileage formulation are advertised for 75000 mi and up is because that's about when the govt mandated warranty for catalyst lifespan expires.

Interesting observation.......

03-08-2015	#1
Roadster Join Date: Mar 2014 Location: Warrington PA Posts: 1,913	Simple oil question? I have 61,800 miles on the 94, is there any concern using MOBIL 1 high mileage 10W-40 for the LT-5, even though it is formulated for 75000 miles and above? Right now i have MOBIL 1 5W-30 in the engine. I know that the Amsoil AMO 10W-40 seems to be the preferred choice for our engines, but am curious about the oil in question. Thanks for any info..... __________________ Tom 1994 ZR-1 #009 "captured test fleet car" 1974 LS4 454 Vert 1982 L83 CFI...now a retired "dd"....Sold WAZOO Member

03-08-2015	#2
edram454 Join Date: Nov 2013 Location: .. Posts: 693	Re: Simple oil question? best oil you can use because of the high zinc content. it provides lubrication to the cam chains and it can be bought at any walmart. it is the best and its what I use. ed ramos #3028 __________________ EDRAM454 1990 #3028..siamese ported plen/hous/SGC/fidanza/DRM LTHeaders/DRM roll cage/camber rod/drilled slot rotors hawk track pads/grand sport calipers/full corsa exhaust/Hurst/NO cats/custom SGC chip/cbeamplate/315's on all 4/intake water plugged/smog removed..RC injectors/LED lights..SHOULD NOT HAVE PUT ALL THE MONEY IN IT.. SOLD.

03-08-2015	#4
Gunny Join Date: May 2005 Location: Georgia Mountains Posts: 926	Re: Simple oil question? Click HERE for a good discussion of oil and the LT5. Mobil 1 High Mileage is listed as acceptable for the LT5 engine with OE valve springs. Amsoil AMO 10-40 is recommended for the LT5 as it has the optimum zinc formulation. This is why a number of ZR-1 owners use/recommend Amsoil. The M1 High Mileage is readily available at my local wallyworld but I can also get Amsoil from a local farmer who uses it in all his diesel engines ... and his price for the Amsoil is close enough to the Mobil 1 that I'm happy using Amsoil.

03-08-2015	#5
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,154	Re: Simple oil question? another vote for Amsoil __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V

03-08-2015	#6
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,306	Re: Simple oil question? I worry about anything I can buy at Wal-Mart. It just seems to devalue it.

03-09-2015	#9
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,802	Re: Simple oil question? I think the reason the high-mileage formulation are advertised for 75000 mi and up is because that's about when the govt mandated warranty for catalyst lifespan expires.