PD' stands for POSITIVE DISPLACEMENT, the pump will push a metered amount of oil (when light glows). The delivery of the oil upon activation of the timer unit is not affected by temperature changes and will continue to work in extreme conditions -5c to +50c.The operation of the pump can be adjusted between 20secs to approx. 110secs irrespective of temperature or oil grade.The container can be fitted anywhere on the bike because being a pump system it will also pump uphill! (max. 1m)We do not supply oil for this unit, but we recommend you use EP80 Gear oil, which can be purchased at most motor accessory shops - but in an emergency you can use any suitable lubricating oil.Easy to set up (but some electrical knowledge necessary). Automatically self priming.Electrically operated 12v system. Automatically operated by ignition switch. Uses only 7 watts in power and this only happens when the timer is activated and only 2 watts when deactivated. A well oiled chain will increase it's life and also raise the efficiency and performance of the bike eg. lower fuel consumption , higher top speed, quieter, etc.If the timer is adjusted correctly, there is no reason why you should not get at least 2000 miles or more per fill up. The container holds 100cc net. of oil.The cylinder size is 35mm diameter x 140mm long and will usually fit on any part of the bike. Bikers usually fit the container under the rear side fairing with the filling spout accessible.