Is 91 octane non ethenal good for 110 evinrude 89 ???

[the gman]

I have been running 91 octane or is 89 better???both are non ethenal

 

[Chinewalker]

Re: Is 91 octane non ethenal good for 110 evinrude 89 ???

Higher octane is not necessary in your outboard.

 

[kbait]

Re: Is 91 octane non ethenal good for 110 evinrude 89 ???

I've used that fuel for all my outboards and no additives. Never had it gum up a carb or go bad over winter. Ethanol fuel (alcohol) likes to absorb water over time, turning into cloudy sludge on the bottom of your tank. Water doesn't seem to work well as a fuel source..

As stated above, the higher octane isn't needed. The lack of ethanol is preferred, IMHO. I gladly spend the extra 30 cents and use if for everything except my car.

 

[scuba_redneck]

Re: Is 91 octane non ethenal good for 110 evinrude 89 ???

In order for you to derive the benefits from the high octane fuel, you would have to have a high compression ratio engine. High octane fuels are designed to prevent pre-ignition during the compression stroke thereby damaging internal components from a premature ignition within the cylinder.

 

[the gman]

Re: Is 91 octane non ethenal good for 110 evinrude 89 ???

so would my engine run better with 89 instead of the 91???? or would there be any differance

 

[metriccrescentwrench]

Re: Is 91 octane non ethenal good for 110 evinrude 89 ???

You won't notice a bit of difference. All you're doing by running a higher octane fuel than required is contributing to the profits of the oil companies.

 

[82rude]

Re: Is 91 octane non ethenal good for 110 evinrude 89 ???

Run what your motor is designed for, anything else is a waste of money.