Oil Guard....
Great oil filter bypass set up but, the customer service sucks and they are super slllllloooooowwww.
BlackStone seems pricey to me, along with Amsoil.
I have been using Schaeffer's synthetic 5-40 and they give me free sample kits but, I prefer results from a disconnected neutral source until a trust level has been obtained.
Blackstone seems to be one of the most trusted names in analysis,
It looks like they have different options for including interpretation.
Which options do you use?
Try blackstone out, sounds like you don't have anything to lose anyway.
Blackstone will send you a free sample kit if you fill out the online form. I have had one on my shelf for 3 years now LOL