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Yeah, but the regular stuff is $20 a quart, I can't imagine what the synthetic stuff costs. I just can't see the minor MPG gains being worth it, and since diffs aren't prone to overheating without being seriously low on fluid or having some other condition present with the bearings I don't see that lowering the temp any is going to help anything.I don't see why it wouldn't lower the temp a few degrees... After all it is more slippery. People have reported minor MPG gains with it which can only come from reduced friction.
At work. My price on a quart of Motorcraft semi 75-140 is $18 and change. Customer's price is $21.something.Where the heck you buy your oil at?