No. The cost of petrol is included in the price. If you refuel on the road, use the cambio fuel card. You will find the fuel card in the on-board manual.
Please do not refuel with premium fuels, otherwise you will be charged a fee. Premium fuels are significantly more expensive than conventional fuels, but have only a few positive effects.
If you pay for the petrol yourself, simply submit the receipt as a scan, photo or original to your office within three months.