Does it make sense to follow a guideline on how to do something if that guideline is 30 years old and there's a better way to do it? Not at all, yet it's still happening with car oil change habits. Most people change their oil every 3,000 miles even though they really don't need to and shouldn't.
A big reason why most people don't know any better is that mechanics are not giving them the correct information. They still use those 3,000 miles stickers and tell them to come back by then, but…



