Can you explain the problems involving oil foaming and drivability problems in Ford/IH Diesel Engines?
Problem: Some owners of Ford trucks equipped with the IH Diesel engine have had drivability problems due to oil foaming. They have been told that it’s because they are using AMSOIL. Answer: All quality oils contain antifoam agents, usually silicone compounds. Silicone, in small quantities, is an excellent foam suppressant. Unfortunately, larger quantities actually contribute to the foam problem. AMSOIL uses the ideal quantity in the diesel oil. In fact, when test comparisons are made between AMSOIL 5W-30 or 15W-40 and Shell Rotella T 15W-40, both AMSOIL oils better controlled foam than the Rotella T. Additional silicone can be introduced to the oil via the RTV Silicone used as a gasket and seal material that has been over-applied and has seeped out from between the sealing surfaces. This exposed RTV Silicone can produce leaching that occurs over time at a relatively constant rate. This means that an oil exposed to this added silicone for a longer time/mileage is more likely to experien
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