by daveesl77 » Tue Feb 09, 2016 10:27 am
If I'm towing on a two lane road, I have a rule of thumb that when a maximum of 5 vehicles have stacked up behind me or if the road is real curvy or has lots of traffic and very hard to pass on, I'll find a safe spot to pull over and let them go by. I kind of stopped using interstates if at all possible a few years back simply because they are boring. I don't care if it takes me another hour or three to get somewhere, I want to see stuff. Now, if I need to get to a place in a more reasonable time, then yep, back on the freeways.
There are so many variables that affect mileage, big ones are 1) speed, followed closely by 2) tow frontal area and shape. A flat front creates far more drag than a curve. 3) is the rear tow shape, once again flat creates more drag and 5) is the height/width of the trailer vs the height/width of the tow vehicle. Weight, while an effect, doesn't come much into play believe it or not. Once in motion, tends to stay in motion.
dave