Lubricity And Diesel Fuel Grades
What is the difference between No. 1-D diesel fuel and No. 2-D diesel fuel and can they be used interchangeably?
Always check with the manufacturer about the fuel requirements of your engine. However, both No. 1-D and No. 2-D are intended for use in compression ignition engines. In fact, in cold weather, No. 1-D is blended into No. 2-D or used by itself. Three of the biggest differences between the two fuels are cetane number, heat content, and viscosity. The cetane number of No. 1-D may be one to two numbers below that of No. 2-D, but still above 40, the required minimum. Since No. 1-D is less dense then No. 2-D, its heat content, measured in Btu/gallon, will be a few percent lower, leading to a similar reduction in fuel economy. The lubricity of No. 1-D is likely to be slightly lower than that of No. 2-D because of its lower viscosity. Its lubricity is unlikely to be low enough to cause catastrophic failure. However, a steady diet of No. 1-D in equipment designed for No. 2-D may result in greater long term wear in the fuel delivery system. |
Doesn't mater to me , I can't get anything but ULSD around town
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ULSD comes in #1 and #2 grades
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same here ULSD I used the Diesel keen and Diesel centane booster every other tank so for 167K and no issues
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for anyone interested in more info about lubricity, here is an interesting test published on another site: Lubricity Additive Study Results - Diesel Place : Chevrolet and GMC Diesel Truck Forums
PS: Diesel Kleen did not score too high on the test but was better then straight diesel ---AutoMerged DoublePost--- and the chart Attachment 34924 |
now the time i am looking for the specs to decide over the differences .. though have not got the comparison in such a detail before
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