Combustion engines, the engines in gas-powered cars, only use a quarter of the fuel’s potential energy while the rest is lost ...

During normal operation, the emissions from a car's tailpipe should be invisible ... On turbocharged vehicles, the presence of bluish-gray exhaust smoke may indicate turbocharger failure ...

The exhaust tips of a diesel truck have a similar function to the muffler tips of a gasoline vehicle. It routes the ... the temperature as it passes the tailpipe. Without those vents, the exhaust ...