Is it okay to just fill up the gas and return the car to the pickup point ?
3 Answers
Fill up the gas (there is usually a gas station at the airport), follow the airport signs to the return point, unload the luggage, wait for the staff's inspection results, and you can sign.
Yes. It's OK to fill up the oil.
Well, just fill up with gas at the place where you return the car. Keep the receipt.