Since its my day off I'll answer a few questions.
I get $1 gas for every delivery I take sometimes enough to cover, often not.
I keep 100% of the tips I make, most of the times id say like 10-40% it goes back to gas.
I use my own car.
Do small shifts 3-6 hrs usually, make around $20-60 depending on tips//deliveries.
Worked there 1+ years, just back for the summer.
Cheers, time to spend my dough!