I have always changed my oil at 3500 miles on every vehicle I have ever owned. I have always used regular oil, I've never purchased synthetic. No one in my family has ever used synthetic. Most people in my family change oil at 5K. No one in my family has ever had a lubrication related failure in a car or truck ever. Never ever. We have kept cars always between 100K and 200K, sold them for other reasons like rust. My father in law routinely gets 250K on every vehicle he'* ever owned, drives them until they are unsafe due to rust, never had an oil related failure of any kind. Probably 10 miliion miles worth of collective experience here. So personally, I think synthetic is a waste of money, unless you need the protection because you run your vehicle hard. I certainly would not spend 30 bucks on oil. Just my experience and 2 cents worth. Mike
1993 Bonneville SE, frame off resto in progress, will be stock except painted black & chrome t-stars, estimated finish date - spring 2009.
Cars in my "fleet": the bonny project, the bonny parts car, 1999 Olds eighty-eight LS anniversary, 2004 chrys T & C.
Husband, father of two daughters, deer hunter and lover of most things GM, (although I do like my Chrysler minivan) - but nothing comes before my girls..
I'd much rather go home after work and be with my family than do anything else..