Quote:
Originally Posted by jeffny09
which one is the differential fluid???? and is amsoil better then mobil 1?
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Here is what the manual says to use
Rear Axle (V6 Engine with
Automatic Transmission)
Rear Differential Fluid 75W-90 to GM Specification 9986155.
GM Part No. U.S. 89021677, in Canada 89021678.
Rear Axle (V6 Engine with
Manual Transmission)
Rear Differential Fluid 75W-90 Limited Slip to GM Specification 9986226.
GM Part No. U.S. 89021677 and Friction Modifier 1052358,
in Canada 89021678 and Friction Modifier 992694.
Rear Axle (V8 Engine)
Rear Differential Fluid 75W-90 Limited Slip to GM Specification 9986226.
GM Part No. U.S. 89021677 and Friction Modifier 1052358,
in Canada 89021678 and Friction Modifier 992694
Here is what Amsoil offers for that
http://www.amsoil.com/storefront/svg.aspx
and the friction modifier additive
http://www.amsoil.com/storefront/ada.aspx
These meet the GM specs.
In independent studies Amsoil outperforms Mobile 1, I have been using it for over two years in all five of my vehicles and love it. Here is the results from their 10W-30. The 5W-30 and 0W-30 oils are even better.
http://www.amsoil.com/performancetes...veOilTest.aspx
http://www.amsoil.com/performancetests.aspx
Their motor oils need to be used in conjunction with their EA filters to get the full life, if they do not offer a filter they recommend a wix and then service the filter in conjuction to the oil life monitor or 3000 miles.