These are shipped dry. The fluid type used is dexron III fluid (automatic transmission fluid). We also offer Royal Purple ATF which will work fine. You can call us at 866-507-3786, and refer to part number RP-12320 for that. One bottle should suffice and I recommend using a turkey baster or something similar. There is a rubber grommet on the motor that when removed, is where you put the fluid in at. I recommend filling the motor and then operating the top several times to remove air, and top off again and your done. This is all assuming there are no leaks and your cylinders are in good shape.