I have a 2000, in which I have already replaced the engine and transmission (see other posts). The window sticker, when mine came out said 56mpg average. The newer ones all say 66mpg. Yes, it's a manual shift. The best I've ever gotten, babying it and trying all the tricks, is 67.7mpg over 1 tank. Is there anything physically, that makes a difference? I hear about all these people getting 75mpg, and I've NEVER been able to squeeze that out unless I am driving no more than 55mph on a flat road with no wind. Here in Florida, I think the mileage actually drops in the afternoon summer heat. I think I get better mileage when it's colder outside. Prob just the humidity. LOL! So my question is, is there anything besides the IMA, ECU, engine and transmission that could affect this? I think I've replaced everything in it, but I wanted to eliminate everything else. Air's off weight's down. Air pressure's up.