My parents have a '90 Grand Prix with the 3.1 liter that they purchased new. It didn't use a drop of oil for many,many years. A couple of years ago, it began to pour oil though. I have heard it could be from a seal where the distributor used to be on these engines.
The engine was always a decent performer, and delivered close to 35 mpg on the highway at times. It still runs good, it just leaks like crazy. My dad uses it as a work car since my mom got a new Grand Prix in 2000. I sure wouldn't put up with that leak like he does though.Like I said, it didn't use a drop and sometimes the oil went 5,000 miles without being changed. My dad always used Exxon Superflo Supreme 10w30, and the engine looked great looking through the oil fill hole.
[ April 30, 2004, 01:58 AM: Message edited by: Racerjk ]