I recently bought a '91 S10 Blazer 4.3L V6. The first few tanks of gas through it went fine and it did not appear to use much oil. Now it seems to be using a full quart every 200 miles or so. I don't see any blue smoke nor do I see any oil under the car. I mean, not a single drop of oil under the car and I park it in the same place every day. I am going to take a close look at the PCV system and do a compression check to look for a stuck/broken ring. It runs great, no noises so that is about all I can think of to check. Does anyone else have any other suggestions?
Tim