Hi Malcolm, how do you to to reach 40 mpg???
I have the CS ecu upgrade, the sport manifold and cat but the stock silencer (the sport one is too noisy for me) and I am unable to do better than 33 mpg...
What is you recepicies ?
Pushing the car by hand getcoat
Or maybe it's the stock silencer that allow me to push harder before having a DB volume that explode my eardrums ...

Dada,
Plus Six "Samantha" (the wooden witch)