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Thanks for your info I think it is pretty much impossible to drive the drive cycle in this city but I have thought about using a dyno but my traction control comes on?, if possible M.B. Doc you can email it I'm not in my office very often and my laptop is my fax machine, I normally drive to and back from the airport and I use my cruise control a lot which seems to keep down on the tickets so maybe these things play into the mix ? I also have a K&N Air filter with high flow cats and mufflers but the RBM folks said that did not matter ? the sad thing is the car runs great and has never given me any problems. I bought a OBDII scanner yesterday got tired of paying 25 dollars to test.