Domestic brands have the most American-made content in the U.S. according to a new index released by American Universityâs Kogod School of Business.
A mechanic can clean or replace spark plugs during a tune up. Most new cars have platinum spark plugs which don't need to be replaced as often as traditional spark plugs. Mechanics can replace a dirty air filter during a tune up. A tune up includes checking and topping off an vehicle's fluids. A tune up is a relatively simple job that some people prefer to do themselves.
Shopping for a tune-up: 1  Running diagnostic tests on highly computerized car systems is typically beyond the skill level of most home mechanics, but many can handle the other steps in a basic engine tune-up. 2  Materials typically cost $25-$100, depending on whether it's necessary to buy specialized tools. CostHelper readers report spending $25-$70 or an average of $56 on a do-it-yourself tune-up. 2  Auto repair shops and gas stations often offer tune-up discount coupons for new customers. 3  For example, the Speedee Oil Change & Tune-Up chain provides coupons based on location, often for 10% off a tune-up or similar services.