About 2+ years ago I opined that maybe we should consider GPM, Gallons Per Mile rather the MPG. Further I raised the point that fuel cost per mile was a more meaningful measure and made comparisons between conventional, hybrid and EV more relevant. With gasoline and diesel fuel near $4.00 per gallon it is worthwhile to expand.
A second point is that since I wrote the blog about 2+ years ago, I have made it a practice to reset my TRIP odometer when I refill the gasoline tank. At that refill time I note the miles recorded and using the ticket from the filling I can now get reminded how the fuel cost impacts the (cents/mile) fuel cost. This is becoming pretty astonishing and I mean OUCH.
SOME EXAMPLES---- Consider my Mercury Sable Station Wagon. On LOCAL driving it makes about 18 mpg which converts (4.00/18) =22 cents/mile. Next let’s consider a new generation PRIUS which yields about 52 mpg. This computes (4.00/52)=7.7 cents/gallon. BIG difference.
BUT now let’s consider say a Nissan Leaf. Here on LI we have the highest electric utility rates in the US exceeded only by Hawaii and a county in Alaska. The Leaf has a 24 kWh battery and delivers 75 miles on a useable charge. This converts into (24 x .220/ 75=.07 cents/mile. Now however if you are upstate NY the kWh cost is 14 cents/kWh hence for the Leaf the per mile cost becomes (24 x .14/75)= 4.5 cents/mile. Shocking!! BTW over the continental US electric cost per kWh ranges from 6 cents to 14 cents.
BUT in no small part, I believe, this explains why by the end of 2013 there will be no less than 11 EV only model cars sold in the US. This will include 2 by Ford, the VOLT and one other by GM, Toyota, Honda, and Mitsubishi plus others.