[Snax]

Figured I'd throw in my quick back of the napkin calculation on cost for my i3:

Charging efficiency is a little over 90% on L2, and for my latest 5 mile commute with about 1 mile of using the heat to 70F in 50F conditions, the car reports 4.1 mi/kWh for the trip.

Currently I pay about 9.2 cents/kWh.

9.2kWh / 90% = about 10.2 cents/kWh actually put into the pack.

So 10.2 cents / 4.1 mi = 2.5 cents per mile.

If I were to drive 1500 miles at that efficiency, that would be $37.50.

1500 miles in my previously daily driven 2002 1.8L Miata works out to $194 at my typical 24MPG and $3.10/gal locally.

That's only a cost savings of about $156, but considering the average person puts 12-15k miles on a vehicle annually, that is somewhere in the range of $1500 in possible fuel savings in a year. (I am struggling to decide which is more fun to drive right now as well.)

Comparing to my other vehicles without hyper-miling or modifications:

- 2015 Fiesta SE @36 MPG (8.6 cents/mi), $1000/yr savings (daughter's car)
- 2011 Flex SEL AWD @18 MPG (17.2 cents/mi), $2000/yr savings (trailer hauler)

Of course this ignores other maintenance for both types of vehicles, but I honestly think that side of it is mostly a wash when amortized out to battery replacement and or engine / transmission failures etc.

So the i3 by today's use is 8.6 / 2.5 = 3.4 x more cost efficient than 36 MPG, 6.8 x more cost efficient than 18 MPG, and about 5.1 times more cost efficient than my previous daily driver.

(I will leave the discussion of having the gassers paid off vs. the loan on the i3 to another discussion though!)