The first batch of pump E 85 ended being winter mix that tested to be E75, that was a long time ago, Every batch I've bough t since has tested to be either E85 or E86. It will get more ethanol content if I let it sit in the plastic fuel jugs more than 30 days, I've seen it go up to E88 and E89 when sitting in my car trailer in thge winter here, the temps will range from -5F to 45 F during the day most winter days and nights here. The gas is lighter(specific gravity) is what I've been told than the Ethanol is so it evaporates out first