Does anyone know the nominal efficiency rating of the following filters:
Purolator PureOne
Bosch Distance+
Mobil 1
Royal Purple
Purolator PureOne
Bosch Distance+
Mobil 1
Royal Purple
Nominal Efficiency Rating
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I think you need the model # too. Did you go to the filter sites? I like moderate efficieny filters - I want oil flowing freely through the engine. IIRC typ the RP and BD+ are lower than the others listed. Beta may be more helpful.
Most filter manufacturers test to ISO 4548-12, which seems to give a better overall indication of the filter's performance.
ISO 4548-12:2000
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Methods of test for full-flow lubricating oil filters for internal combustion engines -- Part 12: Filtration efficiency using particle counting, and contaminant retention capacity.
This part of ISO 4548 specifies a multi-pass filtration test with continuous contaminant injection and using the online particle counting method for evaluating the performance of full-flow lubricating oil filters for internal combustion engines.
The test procedure determines the contaminant capacity of a filter, its particulate removal characteristics and differential pressure.
This test is intended for application to filter elements having a rated flow between 4 l/min and 600 l/min and with an efficiency of less than 99 % at a particle size greater than 10 microns.
ISO 4548-12:2000
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Methods of test for full-flow lubricating oil filters for internal combustion engines -- Part 12: Filtration efficiency using particle counting, and contaminant retention capacity.
This part of ISO 4548 specifies a multi-pass filtration test with continuous contaminant injection and using the online particle counting method for evaluating the performance of full-flow lubricating oil filters for internal combustion engines.
The test procedure determines the contaminant capacity of a filter, its particulate removal characteristics and differential pressure.
This test is intended for application to filter elements having a rated flow between 4 l/min and 600 l/min and with an efficiency of less than 99 % at a particle size greater than 10 microns.
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