I read in one of the advertisements in a CarMagazine that a super charger can up your horse power aswell as fuel effenciy by up to like 30%????

Possible??

 

the engine wont work as hard while cruising and you will get some better mileage if you keep your foot out of it, when you put the gas pedal down is when your mileage will go in the trash

 

MPG depends solely on the tune and driving style.

 

your fuel efficiencly will definately probably not go up, your power gains could also be well over 30% with a little more psi and a tune...

expect your mpg to go down, but it will be worth it for the power gains you get

 

Turbos are better for MPG. When cruising on the highway I would get 45 or so mpg in my turbo d series.

 

Well aslong as you keep the RPMs low i would say that, you will be saving gas but once you start putting the pedal to the metal then youll see it decline but not by a hole lot tho? maybe 5mpgs?

 

Depends on how often you get on it. If you do it alot then your mpg will probably be horrible plus paying for 91+ octane.