Getting a tune-up would be a good idea if you have an older car and have never done one or if you notice a loss of power, fuel efficiency, etc. A tune-up can involve multiple services such as cleaning and gapping spark plugs or replacement if necessary, throttle-body cleaning, air-flow sensor cleaning, cleaning or replacement of the air filter, internal engine and/or fuel system cleaners. It’s best to have this done at the same time as an oil change if the internal engine cleaners are part of the tune-up.
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