You could use an additive like stabhil or something similar.Funny you say that... I filled up the truck the other day and went around corner and stopped at a liquor store, when I came out started truck put it in reverse and stalled... Had to rev engine and drop it in gear to back up... Then put in drive and did same thing... Finally got on highway and stomped on it several times... Seems ok... Tomorrow truck goes in for front left wheel bearing... Got a drs. appt. so get to drive the BMW... Will top off gas then...