Quote:
Originally Posted by phathom
Ethanol = raises octane rating reducing costs in exchange for power, efficiency, and longevity of your fuel related engine parts
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MTBE does the same thing but without being corrosive to many metals, attracting water, causing phase separation, or significantly lowering the BTU content per volume of the final product. When MTBE was outlawed here that meant the end of 94 octane pump gas and the beginning of lower octane ethanol gas.