Why is my truck getting bad gas mileage all of a sudden?
Why is my truck getting bad gas mileage all of a sudden? Here are some the main causes for a sudden drop in gas mileage: Bad oxygen sensor and air filters-in all forms will affect the fuel mixture and your fuel efficiency. Dirty, Bad or leaking fuel injectors or fuel pump-will also affect the fuel mixture and lead to slow acceleration, loss of power and fuel inefficiency. What kind of mpg does a Chevy 5.3 get? Chevy 5.3 owners typically claim an average mpg in the range of 14-17mpg, depending on how much highway driving they do and how heavy...