lol........yes.
mine...altho not properly mapped...was averaging around 10 mpg.
granted, dependant on map iv no doubt it could be mapped to produce somewhere near std mpg. but at the end of the day.........why??
if your spending a big chunk o coin like this on making your car go quicker, why would you be bothered about mpg??
at the end of the day.more power needs moe fuel. simple as really.