Your gasaholic friends may not believe you, but feel free to tell them that diesels will soon be cleaner than current gasoline engines. It's not a trick-they'll have to be that clean if manufacturers ...

Diesel fuel still has a large role to play in achieving greater emissions reductions in heavy-duty trucks, experts said during a recent conference in San Francisco. Separately, they urged more in-use ...

If you’re looking for a new diesel truck, today's crop of oil-burners is full of torque monsters, heavy haulers, and even some of the most fuel-efficient pickups on the road or trail. These big ...

Trail I have owned since new. It's approaching 130,000 miles and on long journeys I've noticed my MPG has dropped considerably. Is it worth getting my engine deep cleaned by one of the systems that ...