Originally Posted by Dak27
Originally Posted by Gokhan
There doesn't seem to be anything special about the Phillips 66 Guardol ECT 15W-40 CK-4, and it has more VII and a thinner base oil than other 15W-40's.
Estimated base-oil viscosity at 150 °C (BO DV150) and VII content of selected oils
Thanks for this chart. Is this the: "A-Harman Base Oil Quality Index" that I've heard a bunch of people here talk about?
Does this pertain only to the finished oil's base, or does it also detail the finished oil's additive pack, along with the base oil?
Thank you in advance!
You're welcome!
A_Harman index, base-oil viscosity at 150 °C (BO DV150 = HTFS (not HTHS)), and VII content estimated by this spreadsheet are different than the base-oil quality index BOQI I have also developed.
What this spreadsheet estimates are the A_Harman index, base-oil viscosity at 150 °C (high-temperature, full-shear viscosity HTFS, directly given by the high-temperature, high-shear viscosity HTHS and A_Harman index) and effective VII content (directly given by the A_Harman index). It does not estimate the base-oil quality or additive-package quality.
The base-oil quality index BOQI ~ 1 (CCS × Noack), not calculated in this spreadsheet, estimates the base-oil quality, related to the API Group number and oxidation resistance of the base oil. It does not estimate the additive-package quality, effective VII content, base-oil viscosity at 150 °C, or A_Harman index.
Originally Posted by Gokhan
There doesn't seem to be anything special about the Phillips 66 Guardol ECT 15W-40 CK-4, and it has more VII and a thinner base oil than other 15W-40's.
Estimated base-oil viscosity at 150 °C (BO DV150) and VII content of selected oils
Thanks for this chart. Is this the: "A-Harman Base Oil Quality Index" that I've heard a bunch of people here talk about?
Does this pertain only to the finished oil's base, or does it also detail the finished oil's additive pack, along with the base oil?
Thank you in advance!
You're welcome!
A_Harman index, base-oil viscosity at 150 °C (BO DV150 = HTFS (not HTHS)), and VII content estimated by this spreadsheet are different than the base-oil quality index BOQI I have also developed.
What this spreadsheet estimates are the A_Harman index, base-oil viscosity at 150 °C (high-temperature, full-shear viscosity HTFS, directly given by the high-temperature, high-shear viscosity HTHS and A_Harman index) and effective VII content (directly given by the A_Harman index). It does not estimate the base-oil quality or additive-package quality.
The base-oil quality index BOQI ~ 1 (CCS × Noack), not calculated in this spreadsheet, estimates the base-oil quality, related to the API Group number and oxidation resistance of the base oil. It does not estimate the additive-package quality, effective VII content, base-oil viscosity at 150 °C, or A_Harman index.