🔍 Key Concepts

• Function of oil control rings on a piston • Difference between compression rings and oil control rings • Effect of too much vs. too little lubricating oil in the cylinder

💭 Think About

• Ask yourself: what problem are oil control rings mainly designed to prevent inside the cylinder? • Think about where excess lube oil would go if not properly controlled and what consequence that would have for engine operation and emissions. • Which option best describes controlling or limiting something, rather than adding more oil?

✅ Before You Answer

• Identify which choices describe adding oil vs. controlling/removing excess oil. • Eliminate any option that would deliberately put more oil into the combustion space. • Focus on the choice that directly addresses oil usage and control, not just lubrication in general.