2.5k on my 94 Dakota 3.9L V6, 100k miles. O/F every other change.
3.5k on her 01 Camero 3.8 V6, 44k miles. O/F every change.
Both get driven allot of short trips=no real warm up time. The Dodge's oil starts smelling
of gasoline at 2k. Its a cast iron motor with a large capacity cooling system and takes forever to get up to operating temp. and yes it has a good t-stat in it.
Smog laws have pushed manufactures into reducing water jacket capacity to facilitate
a rapid warm up. Thats a big plus for oil life. I use a decent brand of 10/30 in both,
I just dump it often.
Hopefully my next car(no more PUs) will be worthy of synthetic oil
