Let's go really OCD.......
Here are a few more suggestions that you could use to get more mpg
(or in your case, to get more mileage money) out of your 'work use only'
ForFour.
Tape over all the panel joins, to streamline the airflow over the car...
remove the door mirrors as they're like airbrakes/barn doors....
position the front wipers vertically for less drag....over inflate the tyres
for less rolling resistance (and grip), and/or fit 15" wheels with ultra
skinny 135/80/R15 tyres that won't let you do over 30mph round bends...
avoid any route that has hills to climb....coast or go into neutral down
any hills....turn off the ignition at traffic lights...never go over 56mph.....
don't use anything electrical (heater fan, wipers, heated rear window as
they will put a load on the alternator which in turn loads the engine)....
avoid driving when the wind blows from the direction you are heading to...
As has been said before, why not remove the seats (except the drivers),
and the carpet, as there's no point lugging that extra weight about.
The extra mpg gained from all those could help you squeeze even more
out of your employer's pocket to subsidize (amongst other things) the fuel
used by the BMW convertible you say you drive for 'social and domestic use'.
Seriously though....I think that you will find that nearly all of the Forum
members own their 'charismatic' ForFour for the pleasure and/or the fun
of owning it, as it is something different...special even. But most definitely
they do not own them for use as a 'work only' vehicle to spin money out of.
