How often do I really need to change my oil?
I have an 06 Toyota Corolla and I know the magic number is every 3,000. The manual says 5,000+. Is it really worth it to change it at 3,000? I was thinking meet halfway at 4,000 miles. Also is it worth it to use synthetic oil or should I just use regular oil. I usually drive around town, to work and school, etc. Rarely use it for road trips over 4 hrs. one way.