Ethanol free gas?

[dodge man]

I know, not another thread on ethanol gas. I am aware of the issues and that’s not my problem. The issue is I had a source for 91 octane ethanol free. I used this on small engines, chainsaws etc. This station stopped carrying it. I can get ethanol free 87 octane. Most likely not a problem except in the two stroke stuff. I think 87 is to low for my chainsaws. My plan is I have a two gallon can, I will get a gallon of 93 octane ethanol gas and blend it with a gallon of 87 octane ethanol free gas. Is this a good plan?

 

[Zmann.]

True fuel sold at the box stores is 92 octane , a little pricey but the equipment starts every time now vs a carb rebuild or a new friggin carb .
I think any ethanol in a small , seldom use motor is a potential for issues
even if you mix it to 50%, if you are near any marinas they often have ethanol free

 

[Username Taken]

I know, not another thread on ethanol gas. I am aware of the issues and that’s not my problem. The issue is I had a source for 91 octane ethanol free. I used this on small engines, chainsaws etc. This station stopped carrying it. I can get ethanol free 87 octane. Most likely not a problem except in the two stroke stuff. I think 87 is to low for my chainsaws. My plan is I have a two gallon can, I will get a gallon of 93 octane ethanol gas and blend it with a gallon of 87 octane ethanol free gas. Is this a good plan?

To my knowledge, ethanol is/was just hard on plastics (Cadillac intake manifolds) and certain rubbers (Hoses, etc) in the old days. I thought most engines have been ethanol-proofed for quite a while.

I also wasn't aware that 2 stroke engines, with their low compression ratio, needed higher octane gasoline.

Ethanol has a much higher octane than gasoline and you might find that some, not all, maybe not even very many, use ethanol as an octane booster in their 'premium' gasoline.

 

[MossRoad]

I know, not another thread on ethanol gas. I am aware of the issues and that’s not my problem. The issue is I had a source for 91 octane ethanol free. I used this on small engines, chainsaws etc. This station stopped carrying it. I can get ethanol free 87 octane. Most likely not a problem except in the two stroke stuff. I think 87 is to low for my chainsaws. My plan is I have a two gallon can, I will get a gallon of 93 octane ethanol gas and blend it with a gallon of 87 octane ethanol free gas. Is this a good plan?

So the ONLY question you want answered is can you mix 87 and 93 to get 91?

Correct?

 

[Zmann.]

I read it as " is mixing ethanol a good plan" ;-)

 

[Rebeldad1]

I use the 89 octane Also add a fuel conditioner and octane boost.
Use the mix in everything gas except vehicles.
All run great

 

[MossRoad]

Oooo I didn't see that his 93 was ethanol.

In all reality, mixing fuels of different octanes and ethanol/non ethanol isn't going to cause a problem. If it were, there'd be damaged engines all over the place and warnings at fuel stations.

 

[dodge man]

So the ONLY question you want answered is can you mix 87 and 93 to get 91?

Correct?

That was part of my thinking, the other is does only having 5% ethanol vs 10% ethanol gain me anything.

 

[MossRoad]

That was part of my thinking, the other is does only having 5% ethanol vs 10% ethanol gain me anything.

You aren't going to notice a thing with those small amounts. Unless you do some pretty exact before and after benchmark comparisons with test gear, nothing's gonna be provable by feel.

 

[MossRoad]

Best practices would be to run the octane rating recommended by the manufacturer 100% of the time unless the engine has been modified.

I can't think of many small engines that call for 91 octane.