Improvements in diesel engine technology allow modern automotive diesels to be quiet, powerful and clean enough to meet California's emission standards.
How They Work
The primary difference between gasoline and diesel engines is how the fuel is ignited. Gas engines use a spark in the cylinder to ignite the fuel, and diesel engines compress the air within the cylinder to produce ignition.
Diesel engines provide more power and fuel efficiency than those powered by gasoline, compressed natural gas or liquefied natural gas.
Diesel vehicles do not typically qualify for incentives.
In some cases, the anticipated emissions benefits from diesel engines have yet to be realized because some automakers had voided the required emissions control technologies. These automakers are dealing with legal actions against them, resulting in billions of dollars in court judgements, and civil and criminal penalties.