Originally Posted By: Danh
Originally Posted By: oldmaninsc
I'm a little confused. You have two reports from the same oil at the same time? In other words both reports were March 22, 2018 and yet one reports much higher fuel that the other?
Yes. As has been discussed here many, many times, Blackstone’s method for determining fuel dilution is essentially worthless and seems to consistently underestimate contamination. Oil Alayzers uses gas chromatography, which is much more reliable.
There have been a number of examples here where the same sample was sent to Blackstone and OAI and Blackstone is much lower.
Thanks for explaining that. I don't usually spend much time in the UOA section, but this one just happen to catch my eye in the recent topics but I have often wondered about the accuracy of these reports. Part of my point was people were mentioning the fuel dilution and not even questioning which report was accurate.
So all the UOA's that are from Blackstone could be considered invalid data - in so far as the fuel dilution is concerned? Interesting!