I really couldn't find a place to offer suggestions. But it would be highly beneficial to many if you could track % towing as well. It's really a separate category because of it's effects on overall MPG.
While I might get 17 on the highway, towing on the highway might result in 12mpg it's never consistent.
We tow full time, as we're full time travelers who travel the country in an Airstream. And this feature would be really helpful in me seeing the difference between when I'm towing our Airstream and when we are not.
Welcome. My favorite uncle had an Airstream albeit about 25-30 years ago and probably 10-12 years old when he got it. They are so nice though it could still be going strong for someone. Enjoy your travels and if you get near Louisville be sure to try Mike Linnig's and Mark's Feed Store for a couple of meals and in Clarksburg, WV be sure to visit Minard's Spaghetti Inn. What is your tow vehicle? Which Airstream do you have? Do you visit any specific events like vintage Volkswagon or quilt shows or model railroad or whatever? Safe travels.