Can New spark plugs improve MPG?
Can New spark plugs improve MPG? Replace Spark Plugs The National Institute for Automotive Service Excellence indicates that bad spark plugs can decrease fuel economy by up to 30%, and can cost drivers up to about 94 cents per gallon at today's prices. Does a tune up give you better gas mileage? Regular tune-ups, maintenance and having clean air filters will help you burn less gas, pollute less and prevent car trouble down the line. A proper tune-up can boost gas mileage by 4 percent. Changing a dirty filter can improve efficiency by 10 percent and using the oil specified...