Editing Two-stroke engine (section)

==Direct injection==
{{Main article|Gasoline direct injection#In two-stroke engines}}
Direct injection has considerable advantages in two-stroke engines. In carburetted two-strokes, a major problem is a portion of the fuel/air mixture going directly out, unburned, through the exhaust port, and direct injection effectively eliminates this problem. Two systems are in use: low-pressure air-assisted injection and high-pressure injection.

Since the fuel does not pass through the crankcase, a separate source of lubrication is needed.

{{See also|API-TC}}