Quote:
Originally Posted by Formulajones
The lifter rotation theory makes no sense. It's not the oil that rotates the lifters, it the taper machined into the lobes and the lifter face.
If it were the oils fault both of my daily drivers would have died a cam failure death a long time ago
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Again, I agree, just saying what Ive read on more than one occasion over the years.
Yes the taper of the lifter/cam is what rotates the lifters... but based on the claim synthetic is too "slippery" so doesnt have the required friction to allow the lifters to rotate. No idea if that could be a real issue, but with all the talk recently of some cam/lifters not having the proper taper machined in, maybe it can contribute to less rotation?
Kind of the same reason some say to not use synthetic for break in, it reduces friction so much that rings wont seat. Yet many new engines like corvettes come with synthetic as factory fill.