Detroit Diesel transitions to four-stroke engines due to emissions and efficiency standards

Detroit Diesel phased out its two-stroke engines due to stricter fuel efficiency and emissions standards. Modern four-stroke engines offer better fuel economy and reduced emissions by separating combustion cycles. Detroit Diesel announced this shift in 1998 as part of a business overhaul. Two-stroke engines are simpler and more powerful but less efficient and produce more emissions, still used in some niche applications.