Nealnfl,
Is the 5.3 the reading from the ProDriver or are you calculating it the old fashion way: total miles / gallons used. If you are using the ProDriver be sure to set it back to zero.
Brian brings up a good point, are you running the generator with 3 CruiseAirs running?
What are you towing?
How fast are you driving?
All of the above have to do with mpg.
I must admit though I get 7.2 mpg towing a Honda Pilot driving 65 mph and 7.7 not towing anything. If I slow down to 60 mph and not towing a vehicle I can get 8.0
Tuga & Karen Gaidry
2012 Honda Pilot