Ok, I know I'm gonna get a lot of flack and flame for what I am about to do, but I'm gonna do it anyways! My wife's car is a 2003 Grand-Am with a 3400 V-6. It has 90,000+ on the engine. It runs good (currently) and burns no oil (unless I put synthetic in it). She makes short runs to work (see my "short tripper" post a few months ago). I happen to have almost a full case of Quaker State 10W40 circa 1985... (I sent Johnny a bottle of it for his collection). Guess where its gonna got? OMG, NO! don't say it! Yes, it's going in her car at the next OCI. Am I mad or what? Don't try to stop me, I've made up my mind already! No, I'm not going through a divorse or anything, just hate to waste "good", free oil. OK, let the firing begin. OH, wait, - I'm also doing a Used Oil Analysis after about 3,000 miles to see how it did. It might take a while since she only drives short trips so bear with me. BTW, she is currently running a mix of 10W-40 (circa 1989), Sunoco 10w30 (circa 2001) and new Supertech 5W30. Should be interesting don't ya think? Believe it or not, I do love my wife!