Best differential oil to use?
Racer
Joined: Oct 2005
Posts: 351
Likes: 0
From: Haw River North Carolina
Royal Purple, Amsoil, and Redline are all great brands and have the additive already in them. Just make sure you get 75w90 weight oil. The GM oil doesn't have the additive in it ahead of time and that's why you have to buy a 4 oz. container separately. All work very well in their own right. I personally run Royal Purple in my car and was very impressed with how much quieter it was after the oil change. I also captured and measured the oil when it came out. (only 1 quart came out! 
) I'm definitely glad I changed mine. Good luck with yours and let us know how it goes. 
) I'm definitely glad I changed mine. Good luck with yours and let us know how it goes.
Thread Starter
Safety Car
Joined: Oct 2004
Posts: 4,816
Likes: 132
From: Plano TX
The Mobil 1 is the most conveniently, within reach brand I have found. I will go with that. It says no additive needed.. I'm wondering about that now. Fully sythetic gear oil.. What do you guys think
Premium Supporting Vendor
Joined: Aug 2001
Posts: 5,364
Likes: 38
From: King George VA
Originally Posted by David426
Should I use GM's brand plus an additive or is there a better alternative to use without having to use an additive. I've read that if you use the GM brand you have to use an additive. WTF?..
__________________
C66 Racing #66 NASA ST2, SCCA T2
AMSOIL Dealer (Forum Vendor)
AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
C66 Racing #66 NASA ST2, SCCA T2
AMSOIL Dealer (Forum Vendor)
AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
