sentences:  Gasoline may be used only in an emergency because it does not properly lubricate the injector pump.While using gasoline, common practice calls for the addition of at least 1 U.S. quart of clean motor oil per 15 U.S. gallons of gasoline (1 imp qt/13 imp gal; 1 L/60 L) for proper pump lubrication where available.Although the A2 version is the most common, there are four different iterations