Is 87 regular gas E10?
Is 87 regular gas E10? In the past, E10 was available as an 89-octane fuel, priced about a dime lower per gallon than ethanol-free, 87-octane regular-grade gasoline. Now, E10 is sold at 87 octane -- a blend of 84-octane regular gasoline with ethanol added to boost the octane to the state-mandated minimum of 87. Is 87 fuel bad? Regular gas is rated at 87 octane in most states, while premium gas is often rated higher at 91 or 93. Essentially, the higher the octane rating, the lower the likelihood that detonation happens at the wrong time. On occasion, this occurrence...