Power King Tractor Fluid has been improved. We have now increased the anti-wear and wet brake performance of this oil to beyond the standards of tractor manufacturers branded oils. This fluid is made with no compromises. Power King Tractor Fluid and Power King Tractor Fluid North are climate customized oils. Use the North version for tractors operated in the northern 25% of the United States and in Canada where it is essential that a fluid provide rapid lubrication at cold winter startup. Use standard version for the rest of the continent.