When should I start using synthetic oil??

[supmet]

Originally Posted by severous01

to determine if you need to change your oil....look at the freakin dipstick. it doesnt matter if the bottle tells you to change it at 3k or 30k....if it's dark change it and the filter. simple...reliable...and has worked for me for 15yrs.

Interesting theory, but I wonder why it is illegal for mechanics to recommend engine or transmission fluid changes based on fluid color.