Used to pull a trailer with a Prindle 16 stacked on top of a Prindle 18 (Totaal 290 kg and alot heavier then a I-20 that way) WITH me 1993 Toyota Starlet. I would easily do 70 mph and still get a mileage of 50 per gallon. At one time I tested how fast my car would go with this setup and I ended at 135 km/h = 85 mph on flat ground. I did this fro about 80 km and couldn't detect any extra fuel consumption. I'm sure that was more consumed but it was so small that I couldn't see at at the pump over the basic 50/gallon that I get when toweing at 70 mph. The covered distance was too short fot that.

Toyota Prius pulling an I-20 ? No problemo !

Wouter