Actually, with the EPA mandating that all motor fuels (petrol (neé gasoline) and diesel) must reduce sulfur levels to no more than 15 parts per million by September 2006, we may see by then the wide application of the very latest in diesel fuel-delivery and exhaust emission technology that could make diesel engine meet the very strict Ultra-Low Emissions Vehicle
certification, similiar to the EPA Tier 2 emissions standard.
Because of that, that will make it possible to sell diesel-powered automobiles in all 50 states in the USA. That could open the door for Mercedes-Benz to sell a lot
more diesel-powered cars in the USA, BMW to finally bring over their high-performance diesel engines to the USA, and Honda to sell their well-regarded i-CTDi engine on the US-market Honda Accord. But a more significant impact is that it could allow SUV
's, light trucks and minivans to switch to mostly diesel power, which could cut fuel consumption of these vehicles 35 to 45 percent!