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.

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.

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

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

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.