Several weeks ago, I posted a question on the forum regarding what others are getting for mpg on tehir 1999-2000 9-5. I was specifically asking about "real world, pen and paper" mpg, NOT the SID display mead outs. From what I gather, just about everyone that responded seems to be getting much better mpg than I am getting. I guess every car is different and maybe I should just resign myself to this fact. I am getting 19-24 this fall and early winter. I think I may have seen 25-26 in the summer once or twice while on some trips. I beieve that I have done just about everything necessary to increase my mpg (new OEM NGK plugs, K & N air filter, fuel filter, MAF and throttle body cleaned, new Michelin tires and 4 wheel alignment, Chevron Techron fuel injector cleaner, new gas cap). I do get an occasional "check engine" light code for "minor evaporator leak" which comes off and on depending on the computers mood. The car has 117k miles, I am the second owner and the car runs beautifully. I think if I finally do get several more mpg's by replacing an O2 sensor, it may cost me more in parts and time in order to squeeze out those few extra mpg's! Can anyone think of any other "tweeks" that I am missing in order to get those small mpg increases? My wife thinks I am becoming OCD over this whole stupid issue? What say you?