01-01-2015, 01:41 AM
(12-31-2014, 02:10 PM)Pauley_imp Wrote: Does CA put extra ethanol in the gas for winter? I've noticed about a 10% decrease in mpg lately.
Sent from my iPhone using Tapatalk
The difference you note is not from more ethanol (they can't do that), it's from more butane mixed into the blend. Depending on where you live the refineries change the blend and add more butane in winter so that the mixture vaporizes easier inside the combustion chamber. More butane equals less mileage.
