In Reply to: Prolong in the crank, tranny & diff? posted by acr on February 27, 2001 at 19:11:58:
I run it in my E30 M3 also but and uphill left right combination starved the oil pickup and spun the number 3 main bearing. So it won't prevent engine damage due to oil starvation, but it will make an otherwise rough engine run smoother and last longer.
BTW: I've tried Duralube and Slick 50 also in the civic, but only felt a difference with Prolong in the engine. Didn't try the tranny and diff.
I would stay away from putting it in the diff, as the diff should have a certain coeffient of friction, it may be too slick.
Any other opinions?