Just stopped at a Galp station in Northern Portugal for LPG. Had a problem getting the nozzle to stay on my adapter, (probably not doing it right). The nice lady came out and showed me how to do it, brute force and a sturdy knee in the right place! Then told me to wait until she went back inside and then which button to press. All good! 1euro a litre. Great service. She told me that all Galp stations have all the adapters under the counter for anyone who doesn't have them. Highly recommended!!