I was looking at some 200hp engines for the old V-dubs, and I just want to know what the fuel mileage of these wonderfull cars would be if I upped the 67hp to 200hp? If I am to go as far as adding turbo to the motor what would I get on mpg? I don't want to pay for the gas milage of a v8 when I have a flat 4. Thanks for you time in advance.