The RT Mileage for the Gatlinburg trip going to and returning was based on 15 fill up’s where I threw out the 2 lowest  and the one highest (downhill mileage) to average 12 fill ups. I also did not always follow the recommended 91 octane per the owner’s manual.Going to Spyders in the Smokies for the 12 fill ups that were used was done using 86 octane’s and 89 octanes. Starting with 86 octanes on the west coast and as the gas got cheaper I changed to 89 octanes going east approx. half way.I was riding solo with approximately 320 pounds of added weight to the bike which includes ryder and luggage and the needed stuff to tour the required distance. My speed was held to not greater than 74 mph regardless of the Max speed limit that was posted, and trying to keep freeway speeds from 68 mph to 74 mph. The wind shield was used as weather required and when not needed the shield was down to its lowest position for that open road feeling.Reaching Gatlinburg, Tenn. and ryding in the mountains, flat surfaces and in the rain which does affect total over all gas mileage. I had a fair portion of the fillips that were used that did land in between 30 mpg to 31 mpg with a few lows of 26mpg to 28 mpg. (Final average results below)On my way returning to Calif. I held the same ryding conditions with the exception that I only used the recommended 91 octane for all fill ups. This did not result in better performance with regards to quick response to the throttle and when the passing power was needed.. Going east from San Diego to Gatlinburg, Tenn. the total average was 28.735 mpgGoing west from Gatlinburg, Tenn. to San Diego, Ca. the total average was 30.0251 mpgI also ran a few  local single fill up test (freeway ryde) when I went to meet up with the AMG demo team in Covina, Ca at Bert’s Mega Mall, Malcolm Smith’s Power Sports and Huntington Beach State Park. I also held 72 mph max and ran with the wind shield up full height to push the air around me and not make me part of the drag of the bike, while the wind shield being at full height may not sound very important, it has turned out to be the way to get the best MPG that you canAt fill up it was 131 miles with a fill up of 4.01 gals for 32.66 mpg going to Bert’s Mega Mall, while returning home I repeated the same conditions and at fill up it was 134 miles with a fill up of 4.13 gals for 32.44 mpg for a single tank fill up.Now just to make sure this was not a fluke I ran the exact same bike conditions to Malcolm Smith Power Sports in Riverside, Ca and the Huntington State Beach Park in Huntington, Ca. for a 3 dealer demo event.At fill up it was 111 miles with a fill up of 3.6 gals for 30.83 mpg going to Malcolm Smith’s, while returning home I repeated the same conditions and at fill up it was 114 miles with a fill up of 3.76 gals for 30.31 mpg for a single tank fill up.At fill up it was 101 miles with a fill up of 3.31 gals for 30.51 mpg going to Huntington State Beach Park, while returning home I repeated the same conditions and at fill up it was 104 miles with a fill up of 3.31 gals for 31.2 mpg for a single tank fill up.I just completed an overnight fun run with the West Coast Spyder ryders and I completed one fill up at 140 miles with 4.28 gals for 32.71So here is what I believe that you will get for gas mileage with a maximum speed of 74 mph.Full height shield going through non mountains areas using 91 octanes as recommended would be 30mpg – 33mpg.Partial use of full height shield going through non mountains areas using 91 octanes as recommended would be 30mpg – 31mpg.Low height shield going through non mountains areas using 91 octanes as recommended would be 28mpg – 30mpg.I cannot give you any data using a trailer that will need to come from Fred and his  You can catch more RT adventures on westcoastspyder.com Remember– it’s about the ryde - not your destination