Why can I use higher levels of DCA4 and make my own low maintenance coolant and use a larger WF2070 series filter?
Even DCA4 and low silicate antifreeze in the levels of 2.5 units per gallon will cause the overall useful life of the coolant to be less than when using ES due to the much higher levels of total dissolved solids found through the “doubling” of phosphate, silicate, and nitrate levels. While this seems to be the answer in light of cost issues, it is a program likely to fail. The reason is that you will have to dedicate service people to accurately measure SCA levels and properly blend into mixed engine coolant. Mechanics do not make good chemists–our experience with customers confirms this.
