🔍 Key Concepts

• Viscosity and separation efficiency in a centrifugal lube oil purifier • How lube oil temperature affects removal of water and solids • Typical recommended temperature range for most mineral lube oils entering a purifier

💭 Think About

• How does increasing lube oil temperature change its viscosity, and why is that good (up to a point) for centrifugal separation? • If the oil is too cool or too hot, what happens to the purifier’s ability to separate contaminants? • Which choice sounds like a general operating recommendation, versus a value tied to a specific engine’s current operating condition?

✅ Before You Answer

• Verify what temperature range is commonly recommended for lube oil purifiers in marine practice (think in °F, not tied to any particular engine). • Check which options are relative values (e.g., "equal to" some other system temperature) versus an absolute recommended range. • Consider whether purifier makers care about the main engine bearing temperature or sump temperature, or whether they specify a stand‑alone inlet temperature range.