Non-Formulated Additives Not Permitted

The following additives should not be used in Detroit™ Gen 5 Heavy Duty engines :

• Soluble Oils: Soluble oil additives are not approved. A small amount of oil adversely affects heat transfer. For example, a 1.25% concentration of soluble oil increases the fire deck temperature 6%. A 2.5% concentration increases the fire deck temperature 15%. The use of soluble oil additives may result in engine overheating and/or failure.
• Chromates: Chromate additives are not approved. Chromate additives can form chromium hydroxide, commonly called "green slime." This, in turn, can result in engine damage due to poor heat transfer. Cooling systems operated with a chromate-inhibited coolant must be chemically cleaned with specially formulate cleaning agents available through authorized Detroit™ service outlets. Only use Detroit™ approved cleaning agents.
• Phosphate Inhibitors: Phosphate has tendency to form deposits on surfaces transferring high heat which ultimately affect cooling capabilities. Phosphate deposits on water pump seals will result in coolant leakage across seal faces.