Filling up on diesel is a sizable investment anywhere, but its price compared to gasoline can vary widely depending on where in the world you buy it.

Ah, the old diesel vs. gas debate. Each type of engine has its fans and supporters, with arguments supporting both. And there are all kinds of things to consider when trying to choose between the two, ...

Diesel climbs to $3.68 nationally, with the West Coast seeing the largest weekly increases for commercial fleets.

Apart from the very curious, not many people ask why diesel engines, compared to gasoline, run higher compression ratios. The argument is reasonably straightforward and starts with fuel ...

The best days for diesel engines might seem to be in the rearview mirror, judging from a few comparisons with gasoline engines, which are dominant in the U.S. among passenger cars and less so with ...

Diesel engines are notoriously robust, but if the fuel they run on gets contaminated, the engine can suddenly become much ...

Venezuela, Iran, and Libya not only share enormous oil reserves, but also a historically conflictive relationship—a far from ...

Motorists will have to pay more petroleum products this week, as retailers on Monday announced another round of hikes to mark the fourth straight week of upward adjustments for gasoline and the sixth ...