Fuel additives are being discussed. Technician A says adding oxygenates to gasoline increases fuel economy. Technician B says adding 10 percent ethanol to gasoline may boost the octane rating 2.5 to 3 points. Who is correct?

Question

Quizplus · Accepted Answer

Adding oxygenates like ethanol to gasoline does not necessarily increase fuel economy; in fact, it can decrease it because ethanol has a lower energy content than gasoline. However, adding ethanol can increase the octane rating of the fuel, which is what Technician B correctly states.

Fuel Additives Are Being Discussed