🔍 Key Concepts

• Difference between full-flow and bypass lube oil systems • Purpose of filters vs. centrifuges in cleaning lubricating oil • How much of the engine’s total lube oil flow is treated in a bypass system

💭 Think About

• Think about what the word bypass suggests about how much of the main oil flow is diverted for cleaning at any moment. • Consider whether it is practical to send all of the oil through a centrifuge or filter continuously on a running diesel engine. • Ask yourself which device (filter or centrifuge) is more commonly used to clean only a portion of the oil flow while the rest goes directly to the engine.

✅ Before You Answer

• Clarify in your mind: full-flow system vs bypass system – which one treats 100% of the flow? • Decide whether centrifuges are typically arranged to handle the entire instantaneous engine flow or to polish the oil over time. • Match the idea of “bypass” with “some of the oil” vs “all of the oil,” then pair that with either a filter or a centrifuge.