HKS Oil Filter's minimum particle size is 20μ compared with 25μ of JIS standard which corresponds to the filteration performance requirement of most engines.
It is recommended to replace a filter every 10,000 km or 6 months under the normal driving environment.
For sports and/or race use, it is recommend to replace a filter every 3,000 km - 5,000km since the engine RPM is increased to several times of that of a normal driving.
- Make sure to select a proper oil filter screw size. Since both screw sizes are very close, M20 filter fits on UNF center bolt. If improper screw size is selected, it may cause the leakage of oil.
- What is UNF screw?
It is a triangular thread form by inch in the ISO standard. The thread angle is 60 degrees. It is classified by the suffix "UN".
The type of screw is described by a pitch as "Coarse" (UNC), "Fine" (UNF), "Extra fine" (UNEF). There is also one for aerospace equipment (UNJ). In Japan, use of this screw type is limited only for aircraft and automobiles, but it is widely used in the United States.
JIS employs only coarse (UNC) and fine(UNF) pitches.
This screw was initially designed for the millitary needs by the United States, the UK, and Canada.
HKS OIL FILTER
|Φ68 X H65 / M20 X P1.5
|Φ74 X H85 /UNF3/4-16
|Φ65 X H50 /M20×P1.5
|Φ65 X H50 /UNF3/4-16
Diameter of Oil Filter Screw
||Toyota, NIssan, Suzuki, Daihatsu
Nissan, Honda, Mitsubishi, Mazda