Timely replacement of the oil filter is one of the most cost-effective maintenance operations. However, an error in selection (incorrect bypass valve cracking pressure, poor quality of the anti-drain valve) can negate the advantages of even the most expensive oil and lead to oil starvation during a cold start.
(Data from the Society of Automotive Engineers - https://www.sae.org/papers/correlating-lube-oil-filtration-efficiencies-engine-wear-881825).
Two Designs — Two Approaches to Maintenance
- Cartridge filters: A replaceable element installed in a reusable housing. They require replacement of the sealing rings during servicing. The advantage is reduced waste. A standard for European brands (VW, BMW, Mercedes-Benz) since the 1990s.
- Spin-on (full-flow) filters: A metal can with a built-in filter element, bypass valve, and anti-drain valve. The advantage is ease of replacement. Common in Asian and American models.
Service Life and Selection
The oil filter change interval corresponds to the oil change schedule: from 7,500 km under severe conditions (short trips, dust) up to 15,000 km when using synthetic oil and moderate operating conditions.
The STELLOX product line includes both types of designs, adhering to automaker specifications for flow capacity and valve cracking pressure. This allows partners to accurately select the filter for the vehicle model without the risk of customer complaints.
Recommendation for Service Shops:
When replacing a cartridge filter, always check the condition of the sealing rings in the housing — their wear is a common cause of oil leaks after servicing.
