Not all engines are created equal........as I'm sure you know.Current VW Sportwagen. 102K/6 years and counting. Modded for >2x stock power. Tracked. First change at 7K after car sat a year on the lot. 180 psi compression all 4 cylinders. No oil consumption. It's really unnecessary for longevity but I get it makes people feel good so just say "It makes me feel good but I know it's unnecessary for long service life."..there, no more debate People always make it sound like you have to do this if you want to keep it a long time which is simply not true.