$0.58 per mile is the standard IRS deduction for business use of a car, meant to fully encompass gas, maintenance, etc., which would suggest a total expected cost of about $348 if you include more than just gas.
$0.58 per mile is about how much it costs to lease a car at $350/month and pay for gas, which is what you would do in an upper middle class job requiring lots of travel.
So if you get a new, fairly nice car every three years and use it exclusively for Lyft, you won't make any money.
If you want to make more money than zero, own your car for longer and do some of the maintenance yourself.
Doesn't Lyft require you to drive a fairly new, fairly nice car?