Lubricity And Diesel Fuel Grades
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From: Why-homing
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.
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.
Diesel Bomber
Joined: Dec 2010
Posts: 1,190
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From: Fool's Golden State
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
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and the chart
PS: Diesel Kleen did not score too high on the test but was better then straight diesel
---AutoMerged DoublePost---
and the chart
Last edited by 2004LB7; Jul 5, 2013 at 01:29 AM. Reason: Automerged Doublepost
