The 3.0 liter V-6 that was in the 1982 Oldsmobile Cutlass Ciera. Bought one from an Aunt that hardly ever drove it. It was about 12 years old at the time but only had like 20,000 miles on it. My wife drove it for a couple of years putting on only about another 5000 miles when the main bearings went. The rest of the car was in pristine shape so I had a new engine put in it, drove it for a couple more years and sold it to a buddy of mine and the main bearings went again with in a year, probably no more than 30,000 miles on the new engine.