Originally Posted by ladytonya
On the dreaded how long between changes topic, I have honestly never know what to do! You read so many different things, anywhere from 3,000 to 10,000 and also depending on driving conditions.
The best answer to this question... That will cause the least amount of hassle is do what the manufacturer of the car reccommends.. Especially when under warranty.. If you deviate away from thier recommendations too much, they can deny a warranty claim on an engine failure if you wait too long between changes.
Outside of that...
Change it when it gets dirty.... When you can't see through it anymore, its dirty enough that it should be changed.. Or if there are signs of contamination in the oil (water, fuel, etc.)
On a brand new engine you want to change the oil right after its been broken in to flush out the junk that gets in the oil from the rings and bearings seating.. anywhere from 500 to 1000 miles usually here..
It also depends on how long you plan to keep the thing.. if your gonna trade it off in 2 years... it wont really matter much if you ever change it or not.. by the time the damage becomes a problem you won't own it anymore.