By most standards 200 parts per million (200ppm) is a small number — a very small number. However diesel fuel standards are not like most, they are extremely rigorous.
200ppm is the maximum water content allowed in diesel fuel in order to conform to ASTM specifications. Or to put it another way, it is the minimum efficiency that a filter must attain in order to pass the SAE J1488 ver. 2010 (passing is a 92% efficiency rating). The test is recognized as the standard in the industry.
It’s tough (which is why it’s good).
The SAE J1488 ver. 2010 is a lab test specifically designed to measure a filtration system’s ability to remove emulsified water. For diesel fuel to pass, and be considered within specification, the emulsified water concentration must be less than 200ppm. This SAE lab test uses very specific diesel fuel that is water-saturated to over 2,000ppm.
Reducing the water saturation by this much is no small task. Especially since it must be done under strict lab conditions and over an extended period of time.
Many fuel filtration systems make performance claims that are unsubstantiated. So it’s not surprising that they may not post their SAE efficiency rating (or worse, discount the test’s validity).
The fact is the SAE J1488 ver. 2010 exists to validate a diesel filter’s performance at removing emulsified water — the most destructive contaminant in diesel fuel and therefore the most critical to remove. Passing the SAE J1488 is scientific proof that a filter can deliver safe fuel that is emergency ready
DieselPure is proven protection against emulsified water. DieselPure exceeds the 92% efficiency rating set out by the SAE J1488 ver. 2010. Few filtration systems pass the demanding requirements of the SAE J1488. Insist on a filter that exceeds them — DieselPure.