Weight per gallon of e10 gasoline?

E10 gasoline, which is a blend of 90% gasoline and 10% ethanol, typically weighs around 6 to 6.5 pounds per gallon. The exact weight can vary slightly based on temperature and the specific formulation of the gasoline. Ethanol is lighter than gasoline, so the addition of ethanol slightly reduces the overall weight of the blend compared to pure gasoline.