11th Jul 2014, 01:15

Funny, I owned an 85 Fleetwood with a 4.1 and sold it with 200,000 miles on it, still running like new.

I knew someone who had an El Dorado with 280,000 miles on it. The body rusted off the car from NY winters, but the engine would not die.

My parents had a Northstar that self destructed at 100,000 miles (as expected with these engines) that was maintained perfectly. The 4.1 was fine if you maintained it and didn't overheat the engine. Northstars were the ones that are notorious for blowing head gaskets. I should know; I have owned Cadillacs for years, as well as having worked on many of them!