How Spark Plugs Can Improve (Or Devastate) Your Fuel Economy

Spark plugs are pretty crucial to internal combustion engines, but can swapping old plugs for new ones really improve your car's fuel economy?
How Spark Plugs Can Improve (Or Devastate) Your Fuel Economy

Spark plugs are pretty crucial to internal combustion engines, but can swapping old plugs for new ones really improve your car's fuel economy?

This article was originally published onJalopnik.

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