quote:Unfortunately no, people are still reporting a lot of piston slap in LS1s, even with SuperSyn. Many have reported it got a lot quieter when they went to 15w50 SuperSyn though (and others reported Amsoil and Redline also lessened or eliminated the noise). But they are just masking a mechanical problem in all honesty. The thicker oil is absorbing some of the sound. Even those with piston slap have still shown good UOAs though, so it doesn't seem to harm the engine life, it's just annoying.
More specifically, a question to Patman: Are LS1s that are known to be slappers, quieter with Supersyn than with trisynthetic, in the same viscosities?
quote:They simply haven't done UOAs and still think their oil is full of contamination at that point. I'm trying to educate my f-body friends on the net that 3k with synthetic is overkill but yet they still do it. Some Corvette owners are even worse, one guy I ran across changes his oil every 1000 miles!!
Originally posted by sprintman: Well why do people in NA change oil every 3,000? I'd sure like to know as its ridiculous.