Which of the following lube oil filters...

🔍 Key Concepts

• Behavior of high-detergent additive lube oils and how they keep contaminants in suspension • Difference between absorption/adsorption filters (like cotton waste, Fuller's earth) and surface/impingement filters • Why modern engines need filters that do not strip out the detergent and additive package

💭 Think About

• Which filter media are likely to remove or neutralize the chemical additives in the oil, and which are designed mainly to trap solid particles mechanically? • Think about which materials (cotton waste, Fuller's earth, chemically treated paper, foamed polyurethane) are more likely to absorb additives versus simply screen or impinge particles. • Which option best matches what you would expect on a modern high‑speed diesel or medium‑speed engine using high‑detergent oils?

✅ Before You Answer

• Eliminate any media known for adsorbing chemicals (like certain clays/earths) that could strip detergent additives from the oil. • Consider which options describe a mechanical or impingement‑type filter rather than a chemical or absorbent type. • Ask: Would this filter type likely be recommended in a modern manufacturer’s manual for engines using high‑detergent oils? If not, rule it out.

Which of the following lube oil filters would be considered acceptable for use with today's high detergent additive type oils?

Cotton waste packed in perforated metal containers or cylindrical cartridges.

Cylindrical elements containing Fuller's earth combined with cellulose.

Chemically treated paper and waste in cartridges.

Foamed polyurethane of the impingement type supported on perforated metal rings.

🔍 Key Concepts

💭 Think About

✅ Before You Answer