After reading this I finally got around to asking them about it and here is their response.
"Hi, Les. Thanks for the email.
If this is supposed to be a 5W/40 oil, then that does change our report slightly, because the viscosity reading is quite low for a 5W/40. The viscosity wasn't listed on your oil slip, just the brand name, so when the sample read in the 5W/20 range, that's what we logged it in as.
This reading would be low for 5W/40 (the MSDS lists the approximate viscosity for this type of oil at ~14.5 cSt, and your reading was just 8.36 cSt), although since that's the only thing reading out of line, we don't see any obvious cause for the viscosity to read so low. The flashpoint was fine, so fuel dilution doesn't seem to be a concern, and no mechanical problems were found. Some types of oil just tend to naturally shear the oil down, so that might be what's going on here, and that's not a problem as long as wear isn't affected.
All in all, it's still a nice report, just with a slightly lower viscosity than we would have expected. No other problems found. Hope that helps. Let me know if there's anything else we can do for you. Thanks!"
Travis Heffelfinger
Blackstone Laboratories
416 E. Pettit Ave.
Fort Wayne, IN 46806
If you do send in yours for testing please let us know what you find. I will now do my next change at 6000 and see how Moble 1 preforms.