Quote:
Originally Posted by Flavor 987S
I believe the "Reader" has BIGGER issues regarding his new rattle. It's not his oil.
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I would not bet on that. Along with dropping ZDDP levels, M1 products have shown a drop in film strength, particularly in the 0W-40 oil. And, in general, any given oil’s film strength decreases with miles, particularly under either high heat or shear conditions, which the car in question was obviously seeing. Higher cold weights (5W or 10W as opposed to 0W) oils from a given manufacturer also tend to demonstrate higher film strength as well. That is also why they suggested the Motul product in a higher weight, which is a Group V oil with both higher ZDDP (1200-1300 ppm) and superior film strength when compared to M1.