I'm skeptical that adding a Fumoto valve and draining the oil hot would improve your fuel dilution. I have a Fumoto valve and I always drain the oil hot and still have quite a bit of fuel dilution in my '22 Subaru Crosstrek engine. I do 3,000 mi OCIs. Check out my recent thread if you haven't already. I sent the same sample to Blackstone and Oil Analyzers. Blackstone said I had no fuel dilution and OA flagged over 3%! Enough said. As others have stated, if you are worried about fuel dilution, do not use Blackstone! You definitely have fuel dilution in that sample! I'm guessing 3% or higher.