Spark plugs are essential components for gas engines. However, these parts are often misunderstood. Here are the top spark ...

Something about engine spark plugs that rarely seems to get mentioned is indexing. What is it, actually? Should you index the spark plugs on your engine?

Side gapping spark plugs can slightly increase horsepower and improve fuel efficiency. However, this DIY mod comes with a major downside for longevity.

When you boil it down, improving average fuel economy is super simple: Burn less fuel in the cylinder when cruising. Toward that end, engine developers have toiled to make lean mixtures work since way ...

Spark ignition engines are shown to have difficulty starting on high methanol-content fuels not only because of low fuel volatility but also because of electrical shorting of the ignition by methanol ...