As testament to the diesel engine's popularity, Ford Performance Parts reports its 6.0-liter Power Stroke diesel was installed in 63 percent of F-250/F-350 Super Duty pickups sold through the first nine months of 2004. GM's 6.6-liter Duramax diesel made up 44 percent of GMC Performance Parts Sierra HD 2500/3500 sales in the same time period (up significantly from just 12 percent in 2000) and 41 percent of the Chevy Silverado HD 2500/3500 sales (up from 33 percent in 2002). It appears that the most devoted diesel fans drive the Dodge Performance Parts Ram 2500/3500, where the 5.9-liter Cummins engine was sold in 80 percent of the heavy-duty lineup through September 2004 (up from 69 percent in 2002.) Diesels don't have the same attraction in the U.S. passenger-car market, where they're just starting to gain showroom momentum following a high-profile but failed effort in the '80s. The 1973 and 1979 gas shortages prompted automakers to offer diesel engines, with their attractive fuel economy numbers, as a way to combat high gas prices. But diesels quickly developed a reputation for being noisy, dirty, smelly, difficult to start in cold weather, and sluggish to drive.