Terms for oil and oil filters replacement
Manufacturers design and produce filters for the spare parts market in the way to have exploitation properties comparable with original filters installed in cars. The filter designing process begins from the careful analysis of construction and laboratory tests of original filters available in the market. Afterwards a number of comparison tests are performed for confirming that the filters offered for the spare parts market are equivalent with originals with regards to exploitation properties and are able to protect the engine to the same extent. This assertion is adopted assuming that users will also comply with the car manufacturer guidance as far as the oil and filter replacement terms are concerned in their cars after the warranty expires and they exploit filters purchased in the spare parts market.
For optimal engine lubrication and effective protection from contamination the car manufacturers specify oil and filters replacement terms. These terms are set with consideration to some factors such as: oil degradation process, ambient temperature, style of driving and air pollution degree.
Taking the said exploitation conditions variations into consideration, some car manufacturers specify two different oil replacement terms. One, for ”normal” exploitation conditions and one for “heavy duty” conditions.
• exploitation in temperature below 10 °C,
Many users are willing to reduce exploitation costs through extending periods between oil and filter replacement in their car engines. It concerns particularly powerful engines where the cost of oil and filter replacement is significant. One should consider if such a procedure brings benefits or losses. The basis for considering the terms of extending oil replacement term as safe is its laboratory analysis. If, during tests, the oil degradation process turns out to be not so advanced and oil contains very little contaminants resulting from engine wear processes, then the oil and filter replacement term may be extended by 20%. Analysis should be repeated each time when the oil replacement term is to be extended, when the results show inadequacy of oil for further exploitation.
To summarise, filter manufacturers do not state replacement terms for theirs filters but design the products to have comparable properties with original filters. Extension of oil replacement term recommended by car manufacturers should be preceded by thorough analysis of potential profits and losses connected with increased engine wear. However real exploitation conditions should be considered, since car manufacturers cannot predict all exploitation conditions. Implementation of recommended oil replacement terms or its extension is always up to the individual car user’s decision.