The first recognizable internal combustion engine was developed by Nikolaus Otto in 1861. Since then, the gasoline-powered engine has evolved immensely. However, the principles that underlie how ...

A spark plug thread chaser isn't always the answer, but it can make a big difference when you're installing fresh new plugs.

In most cases, the number of spark plugs in a gasoline engine is typically represented by the number of its cylinders. For instance, it's perfectly normal for a V8 engine to have eight spark plugs, a ...

Q I had my Mercedes serviced and found out it had two spark plugs for each cylinder. All up, that's 12 spark plugs that needed to be replaced for the V6 engine. What's the benefit of this set-up? A ...

Q: I am the original owner of a 2017 Honda (140,000 miles) that is starting to use a little more oil between changes. I have always used Pennzoil Platinum oil, but switched to high mileage oil at ...

A gas engine needs fuel, air, and spark to get its internals chugging along. Take any of these out of the equation and the engine will have a fit. While the automotive industry shifts toward fully ...

For hot rodders, spark plugs are often nothing more than inspection tools that reveal whether an engine is running too rich, too lean, or just right. Street guys look for a nice tannish-brown tint on ...

It doesn't matter what type of vehicle you drive or which type of spark plug you're using. If your car has an internal combustion gasoline engine, it has the potential to eject a spark plug — although ...