Just to help you with added information, Green Autogas is owned and operated by Greengas, Inc. (one of the 10 DTI-accredited installers) They also have their own refilling station under the name Velco in Mindanao Ave.

Although I've seldom refill my LPG at Velco, my mileage is better than refilling at the nearby Petron Araneta. My mileage in Manila Autogas in C5 is also good. Any explanations?