It's not hard to find very small mass-produced gasoline engines, but diesel is another story. Diesel engines are more expensive to manufacture, so a small-capacity diesel in a cheap car can push up ...

For decades, engineers have used small-displacement engines to prove that raw capacity is not the only path to victory. By ...

Water injection is a tried-and-true method for cleaning up the combustion process in a diesel engine. It reduces both combustion temperatures and the resulting particular emissions. But what if you ...

It’s natural to wonder—healthy, even. Still, it can be scary to challenge what you know. Rarely in life can we do that on a small, inconsequential scale… but if you have a cheap 3-horsepower diesel ...