Just got home from the Laughlin River Run. Ran mostly I-40 from Texas through New Mexico and Arizona. Had no problems finding premium and paid anywhere from $3.40 - $4.05 per gallon. Wife got 50+ mpg on her 1200 Sportster, I averaged 44 mpg on the SEUC with the Bushtec loaded to the hilt behind me.
I did however deduct the day of 30+ mph head/crosswinds with 40 mph gusts. Both of or gas mileages bit the dust that day.
Last year we road to Laughlin starting from Fresno Ca with some friends. Same SEUC, same Bushtec trailer, only that time the wife rode with me 2-up. We got 46-48 mpg on that trip. Wonder if the earth's rotation helped??
Patrick