We may receive a commission on purchases made from links. The glow plugs in a diesel are like the spark plugs in a gasoline engine, but they function differently. The only similarities between glow ...

We may receive a commission on purchases made from links. Over the last century or so, the auto industry has changed in a myriad of incredible ways. It's mind-boggling to think of just how far we've ...

Designed to be combined with a high-tension magneto ignition system, the spark plug solved what Carl Benz had described as ‘the most fundamental obstacle to early motoring’. Over a century later, the ...