Your points about car cost are all valid, and 35c/mile for my little old car includes depreciation. "Paid off" is mentioned because the interest expense is now over and done with, which cuts the operating cost/mile considerably. Interestingly, depreciation has been negative (value has gone up!) in past years when gas prices jumped (as a small car it gets better than fleet average gas mileage).

My note about parking cost is also a bit tongue in cheek but true. The employer's subsidy is supposedly for the transit pass, but it covers so much of the transit cost that for practical purposes it's a parking pass for an outlying p+r lot with a free shuttle to work on the light rail train. If they paid as much as IRS would allow the transit pass (and therefore remote parking) would be free. In-town lots with a short-distance bus shuttle to work are almost 3x the out-of-pocket monthly price even after explicit subsidies, and are less convenient. With gas prices driving more people to transit, though, they might have to start charging for the p+r lot soon to manage the demand (smaller - 100-200 car - lots are often full by the time the 3rd or 4th train of the day leaves). I also ride a bike to the train when I can - pleasant in the morning and a bit of exercise, and saves gas. Increases the cost/mile for the car though - fewer miles to spread the fixed costs over.