Got back from the tour, and the car worked great. No problem on gas.. Most cars were on the last bar at the end of the day at 110-130 miles. A few of the 4 seat turbo cars needed gas to make it.. I was always at around 1/2 tank left every day using anywhere from 7-7.4 to refill. We did right over 500 miles over 4 days. On the gauge, I don't see it being any more or less dusty than the rest on the dash.. Dust was a factor the last day and a half. I ended up pulling my 1/2 windshield off, coming back into Mesquite in the afternoon , in the dust, into the sun. . Couldn't see the trail any longer climbing uphill. with the glare.