Good Day Everyone. I've been putting Mid-grade gas in my 12' Golf 2.5L n/a engine. I've read mid-grade is pulled from the regular (87 oct) gas tank at a ration of 2/3 and the premium tank @ 1/3 ration. Now assumming premium has no ethanol additive added, that gives an 6.7% ethanol added percentage. If ethanol is not so good then I would think using mid-grade is a good choice assuming the gas station's premium tank has no ethanol? I wonder what percentage of ethanol is added to premium gas at various gas station station brands? I normally tank up @ a Kroger's gas station. Anyone know...Just curious. Thanks.
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