I'll kick it off. My trike is a 2007 FLHX (Street Glide) with a DFT conversion. (Pics in my gallery.) Engine is stock with Rush slip-ons and no other mods, no gear change. It's a recent conversion, and I've been logging my mileage to get a baseline. Riding 2-up, I'm averaging 35-37 mpg. That's with about 450 lbs of riders and another 30-50 lbs of gear.