Daytona1 fully synthetic Racing Hub Oil is the key to 'free floating' your spindles for effortless rotation of tires. As always proper oil/fluid levels are critical to the performance of your hubs. Racing Hub Oil comes in a 32 oz bottle and is made in the USA. Oil Level: Important: Proper Oil Level is critical to the Performance of your hubs. To Fill, rotate the hub so the oils fill level is positioned between 8 and 9 o’clock. Front: Fill oil until oil level reaches bottom of the Oil/Fill Level Plug, approximately 6 oz. Rear: Fill Oil until the level reaches the bottom of the Spindle. Approximately 6 oz.. Do not over fill. Overfilling will result in oil entering your side tubes.