TECH TIPS
Engine Coolant Freeze Points
Detroit DD5 Engines For a Detroit DD5 engine the manufacturer spec for freeze point is in between -31° to -41°C (-24 to -42°F) . There is exception to the rule depending on the climate. The coolant that is currently in the DD5 engine is Organic Acid Technology (OAT). These coolants require less maintenance over the useful life of the engine.
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