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I have a 5 gallon can of gas from 8 months ago. I did far less yard work than I intended. I have fuel additives I could use. Joogle says 3-6 months, but I am looking for "real world" answers.

Please only answer if you know what you are talking about, and remember, I already used the internet to try to find my own answers.

Edited: Fuel is 89 Octane with UP TO 10% ethanol added.

I have a 5 gallon can of gas from 8 months ago. I did far less yard work than I intended. I have fuel additives I could use. Joogle says 3-6 months, but I am looking for "real world" answers. Please only answer if you know what you are talking about, and remember, I already used the internet to try to find my own answers. Edited: Fuel is 89 Octane with UP TO 10% ethanol added.

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[–] • 0 pt

don't waste your money on higher octane fuel for yard equipment

I always use the best gas for my lawnmower. Why? It doesn't have alcohol mixed in with it, and thus can't absorb water. Water will mingle with alcohol, and when you have gas with alcohol mixed into it, you get water with the alcohol. It causes rust. Also, I find that the high-test gas starts easier after the mower has been sitting over the winter.

[–] • 0 pt

Unless the pump says ethanol free, all grades of gas will have ethanol and will varnish in months during summer- especially in the humid south.

You are much better off with plain ethanol free- usually sold as 89 octane.