jstim
New member
Are you sure the rear main is leaking? IE, is their oil on the ground? I'm not a fan of any M1 30w oil (their XW-40 is good though) from my Subaru days. The stuff breaks down very quickly, is known for consumption on turbo motors, and has a fairly low viscosity for a 30W even when brand new. If I were you I'd try changing oil brands next change before assuming something else is wrong. For off the shelf oil I've had good luck with Pennzoil synthetic on "normal" cars (use it on my wifes TSX, my 4Runner, and all my old DD's before I had a work car) and Shell Rotella synthetic on high performance/turbo cars.
I'm going to try to confirm or deny it this weekend. I have used royal purple before in other vehicles, and I may just go back to using that.