ethaol
Type in your exact question in google, and you will get your answer!
Yes, it decreases gas mileage.
and it helps destroy our environment even better – great.
I get 35 mpg in my car and when I went to Texas all the gas had 10% ethanol. I filled up, reluctantly, and achieved only 27 mpg. I had no choice but to use it! I’m glad I’m home.