Quote:
Originally Posted by David99GTP  I change mine 3k or less no matter what it says. On all my vehicles I change it when it begins to look dirty even if its less than 3k. |
That's very wasteful. Just because the oil is dark doesn't mean it's "dirty". It's doing its job of trapping and suspending carbon, which a good oil will start to turn dark in the first few hundred miles.
Motor Oil Myths and Facts Quote:
Originally Posted by David99GTP So I'm a believer Changing too often can do no harm, and probably contributed to my engine's longevity. |
Changing oil does help, but changing it at 3k isn't going to make a difference over 5k (or more) if you're using a quality oil.