Keep your Roxor Mission Ready with Our Brown Box oil change kit. (Roxor box pic for representation) You will get 7 quarts of Cen-Pe-Co Extreme Duty 5w40 Full Synthetic Oil & Roxor OEM Filter with a new copper drain plug washer in a brown box. This oil meets and exceeds the OEM specifications of API CJ-4 Central Petroleum Company (CEN-PE-CO) is one of the oldest and largest independent oil compounders in the United States. This means we blend our own oil. We have the ability to obtain the highest-quality ingredients (components) available, blend them together and market them under our exclusive Cen-Pe-Co brand name. Cen-Pe-Co has been in business since 1911, marketing products directly to the heavy-duty equipment user. Known sponsor of the NTPA Pullers association, Truck and Tractor Pullers oil of choice.