The testing itself is to an ASTM or similar standard. That usually doesn't change. The Diesel Place and users financed the testing, but that really isn't the point.Southwest Research Institute performed the study and not the original owner of the Diesel Place site. Tell us what or which has changed or improved, please. What do you prefer, or do you use a fuel additive? Many diesel owners don't think an additive is necessary for engine longevity. Synthetic lubricants have been around since well before 2007. I suspect there have been improvements. Using high quality engine oil is very important for engine longevity. Before servo speed control was added to keep engine rpms constant at idle, changing from regular motor oil to synthetic motor oil raised the rpms at idle. The rpms would rise as much as 200 rpm because of the reduction of friction. Noticed this on a dirt track racing engine.
The following organization performed the study, long ago:
Chemistry doesn't change real fast. My uncle tested oil lubricity back in the 1950s and I noticed on youtube videos recently, some are still doing the test the same way.
You say, "lots has changed back then." Do you mean a lot has changed since then?
Thanks for your very informative reply and technical information!