55 mpg at 55 mph is great in a small car that can haul 5 people at 275 mpg a piece. With the wife along our passenger mpg is 110. That's at 55 mph for as long as I can put gas in the car. I can fill all my cans and carry 28 gallons easily, still with 5 passengers and drive 1400+ miles without a refill or even a stop, if we practiced extreme bladder control.
Makes me feel safe and MOBILE.
A Mirage drive train in the trike would be a rocket ship.
Keep me moving, over 50 , keep me grooving, sleepy gypsie.
regards
mech