i did a serarch, and couldnt find an answer. sorry if i missed it. i was geting around 19 mpg everyday driving, 21 on road trips. i just changed wheels and tyres and i knew it would afect my mpg, but not this much. (32" cooper descovery stt) i just calculated my new gas mileage. 10.59 mpg. 50% decrease! is this all due to the new tyres and the sligte lift that was required to fit acomodate them. or is there something else wrong? my driving habbats have not changed, and im a conservitve driver.