Re: May be of interest to Mobil 1 users.
 

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

Re: May be of interest to Mobil 1 users.
 

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

Re: May be of interest to Mobil 1 users.
 

#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.

Re: May be of interest to Mobil 1 users.
 

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


https://cimg8.ibsrv.net/gimg/www.cor...00970babe8.jpg........https://cimg3.ibsrv.net/gimg/www.cor...7e39289f75.jpg.https://cimg4.ibsrv.net/gimg/www.cor...e6438cbb72.jpg

https://cimg7.ibsrv.net/gimg/www.cor...0f5003d62d.jpg

Re: May be of interest to Mobil 1 users.
 

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:

Re: May be of interest to Mobil 1 users.
 

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:

Re: May be of interest to Mobil 1 users.
 

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.

Re: May be of interest to Mobil 1 users.
 

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?

Re: May be of interest to Mobil 1 users.
 

Amsoil ZDDP Info attached

Re: May be of interest to Mobil 1 users.
 

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

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

H