I figure ~ 300,000 miles useful life to a great ICE car, and about 30 mpg for most people's car choice. That works out to 10,000 gallons of liquid fuel and ~ $22,000 at today's prices.
That's just it, today's prices will always be wildly variable. Gasoline over the last 40 years, even adjusted to the value of the current dollar, have increased more than electricity prices which are heavily regulated.
Let's look at your total tally and some more napkin math:
performance engine: let's be on the lower side and just say $15k
regular unleaded (which we know it'd actually be premium for such an engine, but whatever): $22k
Let's say we change the oil ourselves at 3000 mi at $15 per change for 300,000: $1500
Performance manual transmission: $3500
transmission fluid changes for 300,000 miles (do it ourselves): $500
Right there you're at $42K for the gas and ICE drivetrain (if gas prices did not increase with inflation and there are no wars)
That doesn't include the price of the actual car or anything in it. $$$
for $35K + < $5K for AWD + $12k of electricity assuming no solar panels or supercharging.
So for $52K you get an entire car (tires and all) including electricity for 300,000 miles and should the drivetrain fail in the first 8 years/unlimited miles then they'll replace it.
Keeping in mind the average age of vehicles on the road in the US is only 11.5 years as of 2015 and that was record breaking...
The Roadster had on average 80-85% capacity after 100,000 miles.
Model S is projected to be 92% capacity after 100,000 miles.
Based on 84 data points from the 85-kWh version of the Model S and six from 60-kWh cars, the study concludes that the Model S will retain about 94 percent of its capacity after 50,000 miles, with losses thereafter shrinking to about 1 percent per 30,000 miles.
from an older article
Tesla Model S Battery Life: How Much Range Loss For Electric Car Over Time?
We already know that electric motors typically last forever and data shows the batteries can last a long time too. With the price of the Model 3 battery packs coming down so much in the next two years, I think it's safe to say the TCO for a Tesla is going to be far less than an equivalent performance ICE.