[amccollum]

The standard tax deduction for car travel is $0.70 / mile in the US, which accounts for things like insurance, gas, maintenance, and depreciation. So $500 / month is around 700 miles, which probably around 90% of US drivers surpass.

[tanseydavid]

There is no tax deduction (in the US) for vehicle use that is non-business related.

[zimzam]

Correct, the person you are responding to is using it as a benchmark for the all-in cost of driving a vehicle on a per-mile basis.