The diesel engine was invented in the 1890s and has been in use in commercial vehicles and passenger cars for over a century. Diesel engines remain popular for their reliability and fuel economy, ...

The fuel and exhaust systems inside diesel engines work closely together. As a result, fuel- and exhaust-related issues can be some of the most difficult to diagnose: A symptom in one system often can ...

Much of Lewis Tree Service's maintenance is done by outside vendors, “which makes it interesting,†says the corporate fleet supervisor, Paul Wion. Several years ago, Paul Wion, corporate fleet ...

A motorist fills up the tank of a vehicle at a gasoline station in Littleton. (AP Photo/David Zalubowski, File) How a vehicle built to run on unleaded fuel reacts when diesel is introduced to the mix ...

As harvest wraps up and temperatures fall, it’s time to winterize stored diesel fuel. If No. 2 diesel left over from harvest cools during colder, overnight temperatures, it may reach “cloud point,” ...

Diesel engines have a steadfast reputation for reliability, longevity, and pumping out gobs of grin-inducing, low-end torque. The latter makes diesels preferable over gas engines for hauling, towing, ...

Since launching in 1992 as a replacement for the 6.2 diesel V8, the 6.5-liter GM Detroit diesel engine has had good years and bad years, and opinions on its merits have been just as mixed. Some view ...

The national average price of a gallon of diesel passed the $3 mark for the week ending Monday, Aug. 7, and that was before BP’s announcement of a shutdown in the nation’s largest oilfield. Meanwhile, ...

When Arctic air settles in, drivers of diesel pickups and highway fleets learn quickly that not all fuels behave the same. Diesel can thicken into a waxy sludge that starves engines of fuel, while ...

The fuel and exhaust systems inside diesel engines work closely together. As a result, fuel and exhaust-related issues can be some of the most difficult to diagnose: A symptom in one system can often ...