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<blockquote data-quote="SLE" data-source="post: 368339" data-attributes="member: 3889">If your turning your fuel over regularly, the answer is there is no benefit if the engine isn't designed to take advantage of the higher octane. In fact, it can actually produce harder starts as the fuel is tougher to ignite.With that said, most small engines don't get used on a regular basis and sit for months or a year in storage between uses. This where premium non-ethonal blended fuel can be valuable to small engines as deterioration and moisture control is much better than low octane ethonal blended fuels. Fuel will degrade and lose octane over time also, so assuming you can find non-ethonal blended fuels, if your small engine calls for 87, and sits with 91 that looses some octane over time, it will still likely meet the minimum octane rating.I have a lot of small engines and use a lot of premium fuel between those and the engines that we own that require it. I don't think I've ever had a fuel related issue with any of my engines. I do notice our gravely 72&quot; mower does start harder however running 91 octane fuel.</blockquote>

[QUOTE="SLE, post: 368339, member: 3889"] If your turning your fuel over regularly, the answer is there is no benefit if the engine isn't designed to take advantage of the higher octane. In fact, it can actually produce harder starts as the fuel is tougher to ignite. With that said, most small engines don't get used on a regular basis and sit for months or a year in storage between uses. This where premium non-ethonal blended fuel can be valuable to small engines as deterioration and moisture control is much better than low octane ethonal blended fuels. Fuel will degrade and lose octane over time also, so assuming you can find non-ethonal blended fuels, if your small engine calls for 87, and sits with 91 that looses some octane over time, it will still likely meet the minimum octane rating. I have a lot of small engines and use a lot of premium fuel between those and the engines that we own that require it. I don't think I've ever had a fuel related issue with any of my engines. I do notice our gravely 72" mower does start harder however running 91 octane fuel. [/QUOTE]

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