What KV100 test spec is Blackstone referencing/using? Thier VOA sheet in post #8 doesn't say. Their VOA data sheet doesn't even list the correct KV100 in the cSt "should be" range for 30 grade. People seem to think Blackstone is the "gold standard" for determining oil properties. Keep in mind there are different test standards, so if two places are using a different standard, you're gonna get different answers. Even 10 labs using the same test standard may have some variance depending on equipment calibration accuracy and operator factors.Who knows? Shell’s product data sheets didn’t match the Blackstone tests in these two particular cases.