I just changed my OEM tranny oil over to Synthetic Sychromesh by Amsoil. (A full report to follow... but a little less notchy... which didn't bother me anyway) Officially it takes about 1.9 quarts (?) although I put in the full 2.0 and watched a bit run out. Question, wouldn't the extra oil -- if we put the bolt back in fast enough -- be good for that top gear... or would the extra oil theoretically add too much pressure in the case? By the way, if you change your own engine oil you can probably change the tranny oil. But you'll need to buy 4 feet of clear plastic tube about 3/4" in diameter (it just fits INSIDE the hole, and you must hold the tubing in there) along with a funnel and a friend to pour the oil while you're down under. Of course, don't forget the 17mm wrench and a 3/8 drive. If you have decent access, it's an easy 15 minute job.