Quote Originally Posted by indiej View Post
Yes, and just like the VOAs that people do, wouldn't it be nice that people also do these third party tests? It won't be as numerous as OAs I suppose. 1-3 tests of a line e.g. the Pure One Series or Donaldson Endurance series, and we'll get the idea if they're superb or junk.
There are lots of independent test as well. Just like this Test Pictures and Results - Oil Filtration Comparisons From the Workbench

But all a individual needs to do to see how well there filter is working is do a oil test with a particle count.



A iso test cost about 1600USD a filter so it's not something most individuals who don't have access to the equipment to do the particle counts can do.