Well my gas mileage sucks and it is not because of the blower.I only live about 9 miles from work and the car never gets up to optimum temp so my mileage sucks.When i run it at highway speeds i get about 24 mpg but city driving isnt that bad at all as long as the car stays at temp.And yes it was worth it,the low end power difference was like night and day and the midrange was cool as ****.It dosent have a whole lot of top end power though,it just feels like a very strong n/a car.