Originally Posted By: ottotheclown
Ok, Ok, we must notify Chrysler, Ford, Nissan etc that suggest 3,000 oci with severe service that they are wrong. We have discovered this is a waste of oil and a myth. It is amazing they the engineeing dept. still go by what the quick lubes made do for all these years. Not to mention uncle Winifred, in Maine who has 345,000 on his AMC Gremlin, doing 12,000 oci with Mobil 1. I will sleep well tonite..
I think that sums it up. 3,000 mile oil changes might be a waste. Lots of people have shown they can go much further without ill effects. Back in the 1980s, we ran cabs for hundreds of thousands of city miles, with 6,000 mile OCIs, Wix filters, and QS, all during the peak of the QS sludge-bashing. They all held up quite well.
That being said, if I were buying a used car, all other things being equal, I'd rather buy it from the guy who changes it religiously every 3,000 miles than from the guy who never pulled the dipstick. From the stories and the data here, we know perfectly well that good oil can last a lot longer than that. However, the average guy who lets his oil change go beyond 10,000 miles isn't the guy using a top oil, with a top filter, and doing UOAs. The average guy exceeding 10,000 miles simply doesn't give a [censored].