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Towing with the Highlander Hybrid
First - towing was a dream. A couple of times, got a little tail-wag at 65MPH - I shouldn't be going that fast! Hit the trailer brake and it straightened right out. Went up the hills (mountains) with power to spare. Elevation change was from about 700ft to 4500, with some passes slightly higher.
Total round trip is 450 miles - this was the number of miles towing.
Total miles driven is 730 miles.
Therefore, about 60% of the mileage was towing.
Total average MPG was 16.7
Since I didn't figure out the separate MPG for towing or not, I don't have the exact numbers, but I usually average 28MPG when not towing, so do the math. OK - I'll do the math.
730 miles at 16.7 MPG = 43.71257 gallons
280 miles at 28.0 MPG = 10.00000 gallons
That leaves 450 miles and 33.71257 gallons which works out to 13.34813 MPG during the towing part. Note, your mileage might vary!
I know that I am slightly over the total towable weight for this vehicle, but I felt that it could easily handle the load in braking, handling, and acceleration - especially the acceleration!