Nice report...Test were done on virgin diesel fuel with no lubricity additives. What happens when you do the same test on normal diesel fuel?? Is the improvement accelerated? Also, doesn't higher cetane mean cleaner combustion? If so, does that also mean lower diesel particulates? Lower particulates also mean fewer regens, less effect on egr and higher mpg. I'm not sold on the idea that additives are not good for the 6.7. I'm open to any extra data that's out there. I've found, by imperial methods, big differences in diesel fuel in terms of mpg and regen frequencies from brand to brand and I would expect that the lubricity varies as well.
I think that I'll keep studing this matter and any additional information is greatly appricated.

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7.5 3500QC 6.7CTD 68RFE Build date June 2007
Superchips tuner 3808, Boost/EGT Laser Gauge, Airaid cold intake