The two-stroke engine is mostly a piece of history today, but there was a time when some of the coolest developments in engine technology were two-cycle engines.

Every internal combustion engine needs oil for lubrication, but two-stroke engines take their oil regularly along with gasoline.

The main, anomalous remnants of poor-country pollution standards in the developed world are the two-stroke engines we encounter more often on leafblowers than anywhere else.

As it turns out, you can indeed build a two-stroke engine from scratch, using little more than some metal piping and other parts from the hardware store.

Delivering a powerful punch each and every turn of the crank. Read the full story on the two-stroke engine's expected revival, at Automobile Magazine online.

Two-stroke? Forced induction? Compression-ignition-capable? That is many unexpected engine technologies combined into a single engine.

The early history of Cummins is linked to the Indy 500, where the company raced both four-stroke and two-stroke engines in the 1930s.