I roughly calculated my expenses once.
$32k car $8k tax/license + loan interest up to point I paid it off = $50k $200 gas a month for 6 years = $14400 $4k renew service plan $1200 a year car ins $7200 2 sets of tires at $1k each = $2k
100k miles on it at 6 years
So $50k+14.4k+4k+7.2k+2k = $77.6k / 100k miles = 0.77 cents per mile.
My commute was 40miles each way or $61 PER DAY!!! That's a TON more than public transportation. That price will slowly go down the longer I keep the car but still, $61 per day is a lot of money. At 20days month that's $1220 a month. That's far more than 2 people's monthly transportation passes.