Warut Wetsanarut/shutterstock Unlike gas-powered vehicles, diesel engines pressurize fuel using direct fuel injection systems. It’s then sprayed as a fine mist in the combustion chamber, making it easier to burn. This configuration makes diesel more efficient than gas, extracting mor …

coloritmail/shutterstock The fuel powering your engine needs air and heat to combust, which releases mechanical energy that spins the wheels forward. But where does the heat come from? In diesel engines, glow plugs heat the incoming air and fuel until it’s hot enough to burn, while g …

Brandon Woyshnis/shutterstock The Detroit automaker has become one of the leading manufacturers of high-powered diesel engines in the U.S. The company’s Powerstroke engines currently dominate the market, creating the number-one selling line of pick-up trucks in the country. So, what …

r.classen / Shutterstock.com Today’s diesel fuel contains far less sulfur than it used to. Why? Modern heavy-duty engines have emissions-reduction technology that’s vulnerable to sulfur. They use complex systems to limit their environmental impact, and using sulfur on a new diesel is …

VFXartist / Shutterstock.com The term “torque” is ubiquitous in the auto industry. You can’t buy a car or truck without brushing up against this all-too-important consideration. It’s one of the few specs that will dramatically shape your experience behind the wheel, but many drivers …

Ruslan Lytvyn / Shutterstock.com Every modern diesel needs a dash of diesel exhaust fluid. It’s one of the many products that help your engine run. But what is it, and what does it do? Diesel trucks have gone through many iterations over the last century, propelled in part by the nee …