I had a 5500 in my previous rig, that I used at 4 day events at race venues. It was usually 90-100 degrees and I would run 1 AC most of the time, using two for quick cool down in the afternoon. I ran the generator continuously for up to 96 hours, only shutting it down to check oil twice daily. Under these conditions, it averaged exactly 0.5 GPH. Repeated this multiple times over 3 years and the results were alway the same. Going by the manufacturers specs, I must have averaged just under 1/2 load over the course of 4 days.
Scotty and Kristen, Airedales Dagny and Wyatt
2007 Newmar Mountain Aire 4528, 450 HP ISM, Allison 4000, 8 Trojan T-105's
2014 F150 4x4 Crew Cab Platinum 157" WB
Roadmaster Blackhawk 2, RVI2 Brake System