Not all diesel is created equal. Like gasoline, it comes in various grades, and choosing the right one is important. But which should you pick?

According to Green Car Congress, more than 3/4 of the over 15 million commercial trucks on the road today in the United States use diesel fuel. Diesel fuel differs from gasoline in that it packs more ...

Hydrocarbon deposits on injector nozzles and internal surfaces (far right) can impede their function and performance. Corrosion inhibitors, detergent additives, and lubricity agents can help alleviate ...