Oil Additives. If the service tech tries to sell you additional oil additives, just pass. These are generally a waste of money and don’t actually produce the results they promise, such as added fuel economy. They don’t cost much, but why pay even a little bit for something that won’t make a difference?

Gas Savers. There are a variety of products and gadgets that promise improved fuel economy. Some of them can cost hundreds of dollars, but they likely won’t deliver. The best way to get good gas mileage is to keep to your car maintenance schedule.

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