Originally posted by: oogabooga
i don't know why people change their oil every 3000 miles.. oh wait, i do... car companies and oil companies.
A non-synthetic blend motor oil can probally go around 4000-5000 miles before needing a change
A Synthetic motor oil is reaching it's prime lubricating form around 3000 miles. You can probally go 10k+, but should change around 7500-9500 (depending how hard you've been working your engine).
The CHP (california Highway patrol) uses a synthetic oil, and changes their oil every 10k miles. I think they would know a thing or two about car care..... though not a lot