Any given garage or workshop can house a multitude of different small, diesel engine-powered implements, such as log splitters. The annoying thing about these many small engines is that, much like the ...

Solenoids are everywhere. They open the water valve in your dishwasher, control the flow of gas in your stove, regulate ink delivery in printers, and play a crucial role under the hood of your car.

But does this tech actually do anything? Obviously, an idling engine uses fuel, while an engine that’s off does not. But restarting that engine does use fuel. So which one has more of an impact? Well ...