Technician A says that the use of premium high-octane gasoline in an engine designed to use regular-grade gasoline will increase engine power. Technician B says that flexible fuel vehicles are designed to operate on gasoline or gasoline-ethanol blends up to 85% ethanol. Which technician is correct?

Question

Quizplus · Accepted Answer

Technician B is correct because flexible fuel vehicles (FFVs) are indeed designed to operate on gasoline or gasoline-ethanol blends of up to 85% ethanol (E85). Technician A is incorrect because using premium high-octane gasoline in an engine designed for regular-grade gasoline generally does not increase engine power; the benefit of high-octane fuel is primarily to prevent knocking in engines designed for it.

Technician a Says That the Use of Premium High-Octane Gasoline