For more than a decade, automatic engine start/stop systems were sold as painless climate tech, a clever way to trim fuel use ...

Heavy-duty pickups and long-haul trucks rely on torquey diesel engines that are more economical, reliable, durable, and have a more straightforward construction than a comparable unleaded gas engine.

An automatic start-stop system in vehicles is known by many names: Some call it a "stop-start," others "S&S," and others a "micro-hybrid technology." But whatever you call it, it's a common feature in ...

Today's catalysts for removing unburnt methane from natural-gas engine exhaust are either inefficient at low, start-up temperatures or break down at higher operating temperatures. A new single-atom ...