Island relating to the duties and responsibilities of the Director for the waters of the state, and in. accordance with the requirements of Chapter 42-35, Administrative Procedures Act. Rule 3. - SUPERSEDED RULES. Upon adoption, these rules and regulations will supersede Water Quality Regulations for Water Pollution.
Using low octane fuel in a high octane engine will result in severely reduced performance because the engine will attempt to adjust to the lower octane gasoline. In extreme cases, or with prolonged use of low octane gasoline in these engines, pinging or pre-detonation can occur and can eventually destroy your engine.
While it's true that pure ethanol has a higher octane number, (reason ethanol is ingredient used most often in octane enhancing gas additive products), E10 gas does not have an octane higher than conventional gasoline.(Choose grade of fuel at pump for octane you prefer). When E10 gas phase-separates (high octane ethanol drops to the bottom of the tank with water), the upper tank layer octane typically drops 2.5 points. 2  E.G. 87 octane gas purchased now becomes sub-octane 84.5 gasoline.