As noted, yes the RV lanes have gas. But one caution: not all Flying Js have RV lanes, and the RV indication in the Pilot/Flying J directory is not always reliable. We just completed a 2-1/2 month trip around the U.S., stopping at Flying Js with RV designations all but a couple times. In a few occasions, there were no RV lanes and for some of those, we pulled in assuming there would be an RV island, there wasn't, and then found there was no easy way get out. (I know, I know ... do that before you pull in. My bad.) We never discovered an easy way to determine whether there would be RV lanes or not. Perhaps someone else can chime in.