Not all spark plugs are created equal, and knowing which one your car needs can vastly improve your car's fuel economy.

Which came first, the spark plug or the wheel? Anybody who has watched the Flintstones knows that Fred’s car had no engine. Proof positive that the spark plug came a bit later–100 years ago this year.

This year marks the 100th anniversary of the first commercially viable high-voltage spark plug, patented in 1902 by German automotive pioneer Robert Bosch, who designed it as part of a magneto-based ...