The diagram shows how the oil quality is affected by a Kleenoil filter (the upper curve) in comparison to how it is affected without filter (the lower curve). The original oil quality is normally 18/12, with according to the diagram means that the oil only has an acceptable quality for the simplest applications. Using a Kleenoil filter improves the oil quality initially and keeps it on a stable and high level. Without filter the quality is lowered immediately when water and other particles increases. The diagram texts are correspondent to the wanted quality for different types of applications.

The diagram below shows how many particles, 5 micronsor larger and 15 microns respectively, which are found in 100 ml of oil of different ISO qualities.