Compared to this, even you look like a gas guzzler. Students at Cal Poly have built a super-streamlined ride that clocks a record 2,752.3 miles per gallon. They call it the Black Widow. The all-carbon-fiber three wheeler weighs a scant 95 pounds and is powered by a seriously tweaked 3-horsepower, four-stroke Honda 50cc single. Its coefficient of drag is an astounding .12. It uses 20-inch bicycle wheels, two in the front and one in the rear. Yeah, it tops out at only 30 miles per hour, but still, it’s an incredible feat.