I commute 20 miles to work ... I only have to "plug-in" over the weekends, I don't commute then ... usually, wind/solar/hydro will charge this for free ... saving me $100 per week gas and maintenance ... occasionally not, and I burn a small about of high-sulfur, lead-base radioactive coal ... oops ... and I'm only saving money on piston-engine maintenance; not tires, wheel bearings, brakes and the like ... have you flat-landing city-slickers every done a full tune-up on your rigs? ... obviously not ... dumbasses ...
Why is this a bad idea? ... keep in mind, you don't know where your oil drain plug is or what a 710 cap is ... do you? ...