I used my own car's real-world operations numbers and increased all my costs a bit.
2004 Golf TDI
These are number for operating the vehicle, not owning and so do not include depreciation, payments, repairs, etc. Just the wear and tear on normal service items. Uber does not claim their drivers are professionals or running a business so they don't get to do depreciation for purposes of "ride sharing". If they were taxi/limo drivers they could do that. Yes is costs more than this per mile to OWN a car, but not to drive it.
(all figures are $/mile)
fuel: $.09 [$3.77/gal at a real-world usage of at least 40mpg) (price/gal currently in Phoeinx, AZ)
tires: $.02 [$1,100 every 50,000 miles. I use really nice tires]
oil change: $.008 [$90 every 10,000 miles. includes air/oil filters]
insurance: $.02 [$480/yr at 20,000 miles per year]
miscellaneous: $.01 [washer fluid, headlights, etc. $200/yr assuming 20,000 miles]
Total per mile operating cost: $0.18 or about 5.5 miles per dollar.
Sure if you have an SUV getting 16mpg or a high performance car with really expensive tires or carry boat loads of insurance you can increase the cost per mile substantially, but that is an average car driven by an average person.
So let me do an "average" truck the Ford F150 which is the most popular vehicle in the US line according to a quick search.
fuel: $.17 [$3.55/gal 20mpg average estimated] (again price in Phx,AZ as of today)
tires: $.03 [$970 every 30,000 miles (assuming Nitto 420s) and they are worn down faster than the tread warranty]
oil change: $.005 [$50 every 10,000 miles] ) (10,000 is factory spec. even at 5,000 miles the cost is only a penny per mile)
insurance: $.06 [$720/yr assuming 12,000 miles/ year]
miscellaneous: $.03 [washer fuid, lights, etc. $360/ys assuming 12,000 miles]
Total per mile operating cost: $0.29