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      12-14-2012, 03:01 PM   #71
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Drives: 2011 335i Sedan
Join Date: Aug 2011
Location: Hollywood

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Originally Posted by Efthreeoh View Post
Well, my math is not off. I used Tesla's fuel cost calculator on their website. Using my commute of 160 miles a day (I actually used 185 miles a day for running errands and such) and a Tesla s with the mid-range 60KW battery, the electric cost at .12 KWh is $6.28 per charge cycle. 194,000 miles devided by 185 miles per charge is 1,049 charges. 1,049 charges times $6.28 is $6,586 total cost for electricity for 194,000 miles.

I've spent $23,306 (7,212 gallons) of gasoline in the E90 for those 194,000 miles. Normal maintenance (i.e. no abmormal repairs) for the E90 is $8,706

So it breaks down like this:


Vehicle Cost (purchase price and loan cost)-------$39,554
Fuel Cost (real recorded data)----------------------$23,306
Maintenance (fluid changes, tires, brakes etc.)-----$8,706
Total Ownership Cost -------------------------------$71,566

Tesla S (Estimates):

Vehicle Cost (purchase price and loan cost)-------$69,892
Fuel Cost ($6.28 per charge, 1049 charges)--------$6,586
Maintenance (tires and brakes only)-----------------$5,600
Total Ownership Cost -------------------------------$82,078
That's all well and good and I love crunching numbers quite a bit as well. As you point out below, considering the niche the Tesla resides in, the horsepower it has, and its size, the numbers work out much better when it's compared to something more in its class.

Not that a 528 is in its class, but it certainly swept it there in terms of energy consumption, 0-60 times, hp/tq, carbon footprint, etc, etc.

From motortrend:
During our drive, we used 78.2 kW-hrs of electricity (93 percent of the battery's rated capacity). What does that mean? It's the energy equivalent of 2.32 gasoline gallons, or 100.7 mpg-e before charging losses. That BMW 528i following us (powered by a very fuel-efficient, turbocharged, direct-injected 2.0-liter four-cylinder engine) consumed 7.9 gallons of gas for a rate of 30.1 mpg. The Tesla's electrical energy cost for the trip was $10.17 (at California's average electrical rate); the BMW's drive cost $34.55. The 528i emitted 152 lbs of CO2; the Model S, 52 -- from the state's power plants.

Read more:

Now considering the Tesla is closer in size to a 7-series and it works out in Tesla's favor (except the unknowns for maintenance and battery replacement/efficiency drop).
We do know that Tesla warranties their batteries for at least 8 years/100k, so battery replacement before then can be covered.
2011 E90 / Premium Package / Stage 2 PPK / Performance Suspension