it is not correct, bcz both vehicle are on rent not on contract, means in the case of Rent all responsibility of the vehicle like - Fuel, Operator ( Driver), maintenance etc. of the contractee, but in your case you are filling Fuel, & as like Rent you paid to contractor a fixed amt. So it is not a contract you hired a vehicle on foxed amt, so it is a rent.
deduct TDS @ 10.3% u/s 194I