Internal combustion engines aren’t very efficient. Most modern gasoline engines only convert about 35% of fuel energy into work. Diesels can do over 40%, but need expensive emission systems to stay ...

Undoubtedly, you know a little something about HEMIs, but do you know what the name means? Here's where the high-performance ...

Blow-by can harm an aging engine, but a certain amount is normal for most vehicles. Here is how to tell when there's too much blow-by in your diesel engine.

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

If you mostly drive in heavy traffic, your exhaust tip may appear dark or black, but a long, high-speed trip can help lighten ...

Curious about how an F1 engine works? Discover the cutting-edge engineering behind the world’s fastest cars in this quick and ...

Jet engines are an engineering marvel, but how do they actually work to keep planes soaring at incredible speeds? In this video, we’ll break down the complex mechanics behind jet propulsion in a way ...

The defining characteristic of a two-stroke engine is to fire (combust) every time the piston is at top dead center. This makes them highly power dense, but also notoriously makes two-stroke engines ...

Oil and petrol are miscible. Your 1:50 boat mix is lean in oil. Seagull outboards used 1:10 (smoked a lot and were ...

AVL’s new hydrogen engine injects water to boost power and cut emissions. Here’s how it works — and why motorsport is paying ...

The Alpha Otto Rev Force features forced induction, rotary exhaust valves and can run on a variety of different fuels.