I Do This For The Glory
Join Date: Dec 1999
Location: Nobleboro, Maine
Thanked 0 Times in 0 Posts
Re: Synthetic or fossil for rear end
<font color=blue>Do you have a clutch type limited slip? If so do not use synthetic. It can definitely affect the way the clutches work.</font color=blue>
I have been running Mobil-1 synthetic in the rear diff of both our daily drivers for over 100,000 miles now with no problems. In fact, Mobil-1 is better for LSD's than dyno-oil due to it's heat tolerance. I have even called Mobil-1 and they recommend it for all LSD's. You still need the friction modified though.
Even at 148,000 miles, the LSD in the Trooper locks up tight, and the TJ has 105,000 on it now, it still works well also. I'd highly recommend running Mobil-1 in those applications.
For my daily drivers, I only run Mobil-1 (Redline isn't available up here), but in the wheeling rigs I only use Dyno-oils as they get changed out a LOT more frequently. I typically buy it in the 5 gallon bucket to save some cost as well.
Waldoboro, Maine (yes, we're BACK!)
'81 CJ-8 Scrambled, It's a Jeep, Chevy, IHC kinda thing!
'88.5 Slamurai, 7" Lift, Locked, Swamped, Rolled, and just generally broken in right!