The BMW M4 GTS is one of few production cars to use a water injection system. The M4 GTS sprays water into the intake manifold to cool down air for its engine. How in the world does water help make ...

Excess heat is the enemy when it comes to internal combustion engines. Operating temperature is ideal, but any degree above that starts to slowly sap power, put fluids to the test, increase friction, ...

Saab opened the floodgates for reliable turbo performance back in the '80s, and automakers haven't stopped innovating since. BMW used single and dual turbochargers to make the most of its engines' ...