But as diesel engines become cleaner, OEMs are starting to look at whether they might be more attractive to the un- der-8, 500 lb. segment. ... aquot;Diesel engines are designed with a longer lifespan a we have Dodge Ram customers that have put 1-mil- lion miles on these engines ... PROBLEMS aquot;Typically, a diesel engine comes with a $5, 000 premium a even higher in some cases a versus a gasoline model, aquot; Brosey explains. ... A report of trends in light-duty vehicles from 1 975-2003anbsp;...