you will need to lighten it, and then down size it to a 1liter metro. motor.
not going to get 35mpg, unless your local gas station starts selling imperial gallons,
Queen Anne, gallons are 4.5 liters.
then you will get there.
and keep speeds up high and in 4th or 5th gear.
40mph is the lowest fuel used per mile in my 96 1.6L Tracker 5sp. (have MPG life guage)
on flat ground. steady speed, no stopping......
but that is not going to happen.
best mpg . 30 MPG USG.