Most modern engines are designed to run on fuel with an octane rating of 87. Sure, it will run on 85 but you will be getting less performance, poorer fuel mileage and decreased engine life. That info is all contained in the owners manual. If you are talking about E85, it will kill your engine unless you have a flex fuel motor.
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Lt Keefer
2018 Hurricane 29M
CHF, Saf-T-Plus, SumoSprings
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