This video is a tutorial and documentary on how to refill or re-pressurize an airgun. NOTICE: Coltri Compressors recommends "Coltri CE750 oil" for their air compressor and "Coltri Petrol/Diesel 20W50 Engine Oil " for the EX17D Subaru gasoline engine. Subaru Industrial Power Products recommends API/SE or higher SAE 10W-30 for its EX17D gasoline engine. Follow manufacturer instructions to avoid voiding your warranty. DISCLAIMER: This video is meant for educational & documentary purposes only. All work on airguns and airgun accessories should be carried out by a proficient licensed professional. Airgun Exploration & Advancement Channel nor YouTube will be held liable for any injury or damage resulting from attempting to duplicate anything shown in this video. Airgun Exploration & Advancement Channel is not a store. We do not sell airguns, airgun parts, or airgun equipment. By viewing this video, you are acknowledging the contents of this disclaimer.