We're at 43 gallons purchased, 33 hours of driving time, in large city, expressway/stop and go seeming to average under 35 mph. There are a lot of miles driven at expressway speeds. 20.3 mpg with 50 to 30 degree temps.

 

The 3.7L is now up to 45 hours of driving time on 60 gallons of 87 octane Shell gasoline purchased. All cross Big City expressway and small town stop and go. Finally averaging a little over 30 MPH and between 20 an 21 mpg. 1.333 gallons per hour. My 50HP Pontoon boat uses 4 gallons an hour just puttzin around.

 

I'v now reached 65 hours of driving time while burning 94 gallons of Shell 87 octane. The lifetime is 20.2 mpg.