Chang notes that diesel is cheap and that diesel vehicles have a life expectancy of 400,000-500,000 kilometers, or about twice that of gasoline-powered vehicles. He further notes that diesel vehicles have been heavily promoted in the environmentally oriented European Union because of their exceptional efficiency. In Germany, more than 50 % of the passenger cars on the road are now diesels.
他指出，柴油便宜，柴油車壽命長（可行駛 40 到 50 萬公里，是一般汽油車的二倍），且柴油引擎熱效率高、油耗少等，是重視環保的歐盟大力推動的運輸工具，目前德國上路的柴油小客車比例已超過 5 成，性能也愈來愈好。