quote:Pretty much, I remember reading numerous things on owners just taking it to the quick lube and complaining when they have problems. If they would have used a factory spec oil in the first place the problem wouldn't exist.
There are at least a couple on the list that REQUIRE synthetic oil to maintain warranty coverage; the VW & the Audi. I have yet to see one proven case in which an owner of either the VW or Audi changed the oil as prescribed in their owner's manual with VW 502.00 rated synthetic, & still suffered sludge. Even the Audi with it's 10k mile OCI, still has a clause in the owners manual that says the oil should be changed more frequently if it is operated in severe service. People don't read their owners manuals.