For 200k miles the Ford has had a steady diet of MC syn-blend 10w30 then 5w30. I was having small leaking in the rear main and the oil pan gasket. It looked like maybe 10 drops or so on the pavement after each time it was driven. Last OC I put in M1 HM 5w30. After 2,000 miles, I see absolutely no drops or sign of leakage...for the last 500 miles.
It might be too early to praise the success, but no doubt there is a change. I guess the M1 HM 5w30 is thicker than the MC 5w30, but I can't imagine that small difference would stop the leaking.
It might be too early to praise the success, but no doubt there is a change. I guess the M1 HM 5w30 is thicker than the MC 5w30, but I can't imagine that small difference would stop the leaking.