Looks like there is no gas mileage penalty with the DME stage tune and VSRF cat
less downpipes. With over 2,200 around town miles after the ECU tune and downpipes the average mileage is 21.8 MPG. This with sensible use of the throttle in a urban environment. Occasional full throttle usage was also included where possible. I made a 200 mile trip today on the interstate and the car returned 28.9 MPG at mostly 75 MPH which was running with traffic. The mods did not affect the sophisticated feel of the car and are all a plus as far as I am concerned. I had the car in for a warranty repair and normal service and nothing triggered any questions.
