ok, so I read through the rest of the posts and I feel the need to put this up here because, well, I think it might save some people some engines.

Mainly, don't redline your cars. I mean, I like driving fast -- I know my acura's top speed, I've hit it. Hell, I hold drag races with my friends out front of my house. But look, doing 90 in 3rd is only useful if it gets to 90, then you bump up to 4th, and that's only for accellerating. The powerband sits around 4500 to just into the redline, and it peaks around 6 if I remember correctly, so you don't want to sit that high on the RPMs. Also, if you're cruising at 110, just sit in 5th. If you arent' accellerating, go to the highest gear that will maintain your speed. Better gas mialage, easier on the engine, and you can always downshift if some punk in a golf thinks he has a real car.

General rule of thumb: be in the highest gear you can without losing performance. It won't hurt your driving and your car will love you for it.

Hope this saves soem people some money.

-Dan