Abstract: An improved lubrication system for lubricating the moving parts of a walking beam compressor used in compressing low pressure natural gas. The compressor is mounted on a walking beam oil pump. The lubrication system introduces oil through the length of a piston shaft and through a plurality of oil cooling chambers in the interior of a piston. The oil is then forced out through piston outlet ports disposed between the piston's compression rings and wear rings for providing an improved lubricant seal and extending the life of rings.