Originally Posted by K20FA5
I emailed Eaton to ask them if I should or should not use a LS additive. Their answer was no additive, below is their email reply:
[color:#CC0000]Hello Brian,
Both synthetic and mineral based are sufficient. Although the G80 uses clutches, it is a full locker. If you use a friction additive this can reduce torque / load carrying capacity and is not recommended. As far as oil weight, please use the specified oil weight and quantity in your vehicles owner's manual. Eaton has no oil brand recommendation.
Thanks,
-Eaton Performance Support
I guess that means I'm going to go with Delvac 1 75W90, full syn with no LS additive.
^ Thanks for this. Finally some clarification from the manufacturer (Eaton) on what to use in my G80 locker! 2005 Chevy Avalanche 2 WD with 206,000 miles, most likely FF, since I bought it used. I just ordered a gallon from Amazon.