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**Carl n Susan** · 05-23-2019, 06:48 PM

Cetane ratings may vary from state to state.

The U.S. Environmental Protection Agency, the government’s air-quality police, set a minimum CN of 40 across the country, with the final CN left up to individual states’ EPA regulations. For example, the California Air Resources Board (CARB) currently mandates a minimum 53 CN, while Texas (TxLED) set its highway diesel CN lower, at a minimum of 48.
Source: Clicky

I thought the Ford Diesel Supplement recommended a minimum Cetane level of 40. But I haven't found that documentation, yet. In the mean time, ask what is your state's minimum Cetane requirement? Perhaps that Cetane additive is unneeded?

05-23-2019, 06:48 PM	#20
Carl n Susan Site Team Join Date: Oct 2005 Location: Carmichael - CA Posts: 7,393 M.O.C. #4831	Cetane ratings may vary from state to state. The U.S. Environmental Protection Agency, the government’s air-quality police, set a minimum CN of 40 across the country, with the final CN left up to individual states’ EPA regulations. For example, the California Air Resources Board (CARB) currently mandates a minimum 53 CN, while Texas (TxLED) set its highway diesel CN lower, at a minimum of 48. Source: Clicky I thought the Ford Diesel Supplement recommended a minimum Cetane level of 40. But I haven't found that documentation, yet. In the mean time, ask what is your state's minimum Cetane requirement? Perhaps that Cetane additive is unneeded? __________________ Carl (n Susan) There is more to life than fuel mileage. 2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB