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Message: <blockquote data-quote="Old-Raptor-guy" data-source="post: 2057422" data-attributes="member: 52062">I will see if I can find my post. I get tired of reposting it.  So I will sum it up.Been mechanic since 1986,  today right now I am doing more internal engine repairs that I have ever done.  In the 1980's / 90's we did a shit ton of oil leaks.  Gaskets and such but honestly internal engines (internally lubricated parts) were not that common.  Do some research.   The reason I say that is, educate yourself and come to your own conclusions.   Around 2004 three things happened. 1: oil change intervals got larger2: oils got thinner (5w-20 vs 5w30)3: zinc allowed in oil dropped (zinc is a very good anti-wear agent)Those three things have caused the average engine life to drop by about 20%Those three things were mostly due to government mandates (so don't hate the manufacturer totally)The engines I see that reach 300k are normally serviced 2x the manufacturers recommendations.   Also read the fine print the 10k oil changes are based on best case scenario (which applies to only about 5% of the population) so even the manufacturer knows this is garbage, but is meeting government mandates by publishing longer intervals.Any oil 30 weight or lower (0w20, 5w20, 5w30) is only allowed about 700ppm zinc while any oil 40 weight or higher (0w40, 5w40, 5w50) is allowed more zinc, around 1200ppm.</blockquote>