Drove 2000 RPMs on the highway for 1 hour

[Perfectlap]

I saw a piece on a guy who drove from Chicago to NYC on one Toyota Prius gas tank. He basically stayed in the right lane stuck to the speed limit and coasted whenever he was heading down hill. He averaged 70 mpg! He pointed out how going slow on the highway really doesn't get you home that much later. "Maybe 5 mintues".

So yestereday I deployed this tactic on an hour long drive from the beach.
Lowered the top and stuck to the speed limit never going more than 5 miles over.
Sure enough EVERYONE was passing me, no doubt in a hurry to get home.
I kept the car in 6th and stayed constant on the throttle with the tach never going over 2100 RPMs. I got home about 15 minutes later than I usually would but the needle on the gas tank barely budged...hmmm.