Originally Posted by jonharb
dude you guys are nuts, on dialy drivers its should be every 3k miles or less, NO MORE!!!
That was true more than a decade ago...
Cars newer than about a '92 model, check your owner's manual, about 7500 miles is the current recommendation. Oil technology and purification has come a long way.
In my case, the engine was built fresh, and using synthetic oil, contamination tests say I'm still changing it too early at 6k miles.