Learn more about whether Allison Transmission Holdings, Inc. or Cummins Inc. is a better investment based on AAII's A+ Investor grades, which compare both companies' key financial metrics.

FRESNO, Calif. (KFSN) -- The sale of new diesel trucks in California won't have to hit the brakes any time soon. That's ...

The fuel economy standards have been in place since the 1970s energy crisis and were intended to conserve fuel and save ...

A Circle K gas station in Avon, Ohio, mistakenly swapped diesel and unleaded fuel, leaving customers with costly car repairs.

The Duramax diesel is a series of diesel engines manufactured by General Motors. Here's a breakdown of the generations over ...