The eMPG is an attempt to convert WH/m into MPG based on some fixed numbers for $/kWh and $/gallon.
a WH/m x b $/kWh / 1000 = x $/mi
c $/ga gasoline / x $/mi = mpg equivalent.
For a=300, b=0.15, c=$3.00 you get 66mpg.
You can plug in your own numbers as you see fit.
The cost savings is then estimated by plugging in a number of miles driven, and comparing gallons of gas versus a hypothetically less efficient car (not sure what MPG rating Tesla uses for its comparison)
Note that the Tesla Model 3 is closer to 150 WH/mi. And what does gasoline cost in those European countries?
a WH/m x b $/kWh / 1000 = x $/mi
c $/ga gasoline / x $/mi = mpg equivalent.
For a=300, b=0.15, c=$3.00 you get 66mpg.
You can plug in your own numbers as you see fit.
The cost savings is then estimated by plugging in a number of miles driven, and comparing gallons of gas versus a hypothetically less efficient car (not sure what MPG rating Tesla uses for its comparison)
Note that the Tesla Model 3 is closer to 150 WH/mi. And what does gasoline cost in those European countries?