My Honda Civic handbook says the car can run on 91/95 octane. Does this mean I can use 91 octane? If so, is there an advantage to use 95?

My Honda Civic handbook says the car can run on 91/95 octane. Does this mean I can use 91 octane? If so, is there an advantage to use 95? - 1

Use the 91 and forget the 95, its just costing you money.

If it says 91 use 91. There's no advantage in paying for dearer fuel.

No, there's NO advantage to using higher octane (more expensive) fuels if your engine does not need them. Also note that different countries certify octane using different methods. A 91 octane gasoline in Europe would be 87 octane in America.

Yes you can use 91. It will perform a little better on 95

If your Honda runs OK on 91 octane then continue filling it with 91 octane to save money. If you feel your Civic runs better on 95 octane then pay more for 95 if you want to. The manufacturer says 91 is OK, just DON'T go down to 89 or 87 if they are available, because they might do damage.

It means, in the words of Kurt Russell from Stargate, "Give my regards to King Tut a sshole!"

That's exactly what it means - it will run on 91 if you have to penny pinch, but it will perform at its best on 95. There's no advantage to using higher than 95 e.g. 98.

Not unless it's a type R.

No, Honda Civic requires the use of 91 or 95 octane fuel unless it is a Si or Type R. All standard Honda Civics can run perfectly on 87 octane and the use of any higher octane will provide no benefit whatsoever. It is a myth that higher octane provides more power or better MPG. You only need to use 91 octane if you have an Is or Type R.

Economy ($$) vs performance (hp)

It's slight economy vs slight performance.

Which ONE do you prefer?