Plus 3 Golfer
Veteran Member
I wonder what the difference really is between the diesel fuel sold in canada and the states - its hard to believe that canadian fuel has more lubricity ....maybe more cetane but the higher cetane you have doesnt mean more lubricity...unless am wrong
Here's a link to read.Canadian Fuel is <460. I think Bosch specs are <520. From what I heard there have been very few Canadian HPFP Failures.
Q
I believe several important points on lubricity can be seen on this table. First, the max HFFR wear scar is 679 microns from the samples tested for lubricity. So, we know that at least one US sample had a wear scar that according to Bosch would cause catastrophic failure of the HPFP. In addition, note that the conclusion drawn is that if the average wear scar meets standard that everything is okay with respect to lubricity. Lastly, note the poor repeatability and reproducibility of the wear scar test.
So, VW is likely correct, it's poor fuel quality causing the HPFP failures.
S
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