Disregard. I tried the link again and the bottom link actually took me to the article.\
This link works well.
OK, read the article and I think the following should be taken into consideration when evaluating the results. "Skipping to the end" would actually result in a correct selection of the "best" additive for improving lubricity but not determine WHETHER IT WAS REQUIRED.
"-The independent research firm obtained a quantity of “untreated” ULSD fuel from a supplier. This fuel was basic ULSD fuel intended for use in diesel engines. However, this sample was acquired PRIOR to any attempt to additize the fuel for the purpose of replacing lost lubricity. In other words, it was a “worst case scenario, very dry diesel fuel” that would likely cause damage to any fuel delivery system. The fuel was tested using the HFRR testing facility at the Laboratory.
This fuel was determined to have a very high HFRR score of 636 microns, typical of an untreated ULSD fuel.
It was determined that this batch of fuel would be utilized as the baseline fuel for testing all of the additives. The baseline fuel HFRR score of 636 would be used as the control sample. All additives tested would be evaluated on their ability to replace lost lubricity to the fuel by comparing their scores to the control sample. Any score under 636 shows improvement to the fuels ability to lubricate the fuel delivery system of a diesel engine."
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