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Q: What spark plug should I get

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I was wondering what spark plug I should use to get the best gas mileage and lifetime out of my car.. Any suggestions?

My car has 213230 miles.
My car has an automatic transmission.

There are many good quality spark plugs on the market. With each manufacturer there will be different quality plugs. They use better metals on the tip of the electrodes in the more expensive ones and the plugs will last longer before needing to be replaced.

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