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      12-24-2012, 01:41 AM   #31
DnA Diesel
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Canada
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Drives: 09 335d Sport SGrey/Blk/Blk
Join Date: Dec 2009
Location: Ottawa, Canada

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Cetane is less of a factor than lubricity. Canadian diesel must meet a maximum 460Ám wear scar rating. US diesel only has to meet a 520Ám maximum wear scar rating. I believe European diesel specifications allow only a maximum of 350Ám wear scar.

Smaller wear scar is better, meaning that on a test rig, the fuel with greater lubricity will result in a smaller scarring on the test surface.
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2009 335d Sport - Space Grey, Gloss Black on Black Leather (pics)