I was thinking about picking up a '93 RX7 just to have fun with.... Ive heard from people that the rotaries ocassionally burn oil, etc., and arent extremely reliable. Ive worked with rotaries before (though on a smaller scale) and have experienced some of this, but just wanted some info from someone who has experience with mazda's motors. Also, Ive read that Mazda did some work on the later model engines and made them more reliable.. how much truth is there to this and what changes were made? Any advice you've got is appreciated. Thanks.