Hello members, just bought a 2011 Chevy Cruze LT, with beautiful leather seats. I bought it from an American gentleman who gave me a reasonable prize. Car is in very good shape except that it has been doing poor mileage per gallon of fuel. I understand that previous owner doodled with his laptop and of knows what software to make adjustments to vehicle. Can someone help me to find out why am I getting so poor mileage.