TxDoc,

I got this straight off the Eaton Webpage FAQ

http://www.torquecontrol.eaton.com/prod6.htm

"What type of lubricant and limited slip additive should I use with my newly purchased Eaton Limited Slip Differential?

Eaton strongly recommends utilizing an API-GL5 approved Mineral-Based 80W-90 Axle Lubricant and one 4-oz bottle of Limited Slip Additive (GM or Ford)."

I was getting ready to put Mobil 1 in, since it is API-GL5. Other than Eaton's above recommendation and since GM itself is going against this recommendation, why do you not recommend Mobil 1?

If you got your info about their using synthetics from Eaton, are they not also contradicting themselves?

Joe