Clean diesel systems are both fuel efficient and environmentally friendly. When compared with comparable gasoline passenger vehicles, clean diesel passenger vehicles offer 30 percent better fuel economy and up to 25 percent less CO2 emissions with no sacrifice to power or performance. In fact, clean diesels provide 50 percent better torque.

The technology behind today’s clean diesel engines is based on a more effective fuel-injection method, making diesel fuel more efficient than gasoline per gallon burned. Diesel fuel also has more concentrated energy than regular gasoline. Therefore, it also takes more gasoline to equal the power output of diesel – a gallon of gasoline only has 125,000 BTUs (british thermal units) compared to diesel’s 147,000 BTU.

Diesel engines are cleaner than ever before. The result is a new clean diesel system – combining clean diesel fuel, advanced engines and effective emissions-control technology.

Fuel: Clean diesel fuel is “clean” because it has 97 percent less sulfur. That’s why it’s also referred to as ultra-low-sulfur diesel (ULSD) fuel. Clean diesel fuel contains only 15 parts per million (ppm) of sulfur content.

ULSD is available nationwide, the result of a series of mandates enforced by the U.S. Environmental Protection Agency (EPA) beginning in June 2006. The EPA’s first mandate required U.S. refiners to produce 80 percent of their annual output as USLD; other notable mandates such as labeling fuel type and sulfur content soon followed.

Engine: Diesel engines are the world’s most efficient internal combustion engine. Advanced new technologies such as electronic controls, common rail fuel injection, variable injection timing and turbocharging have made clean diesel engines cleaner, quieter and more powerful than ever before.

Emissions Control: With the introduction of ULSD fuel, a number of exhaust treatment systems, such as particulate traps and catalytic converters, can further reduce engine emissions.

Clean diesel has arrived.