Originally Posted By: Garak
Originally Posted By: Gokhan
I just looked at the data sheets and the SN PLUS QSUD 5W-30 is a lot thicker than the SN PLUS PPPP 5W-30. From the A_Harman index calculations, I estimate QSUD SN PLUS 5W-30 HTHSV = 3.3 - 3.5 cP.
I wouldn't hold my breath on an ILSAC lube having an HTHS that high.
Good point. I wonder how difficult for a GTL base oil with plenty of moly to pass the fuel-economy test if it has HTHSV = 3.4 cP.
Yes, there is the possibility that it's loaded with VII and HTHSV = 3.1 - 3.2 cP. CCS and MRV are looking very good though and we have no evidence of high VII content (small A_Harman index) in PP and QSUD in previous formulations.
Originally Posted By: Gokhan
I just looked at the data sheets and the SN PLUS QSUD 5W-30 is a lot thicker than the SN PLUS PPPP 5W-30. From the A_Harman index calculations, I estimate QSUD SN PLUS 5W-30 HTHSV = 3.3 - 3.5 cP.
I wouldn't hold my breath on an ILSAC lube having an HTHS that high.

Good point. I wonder how difficult for a GTL base oil with plenty of moly to pass the fuel-economy test if it has HTHSV = 3.4 cP.
Yes, there is the possibility that it's loaded with VII and HTHSV = 3.1 - 3.2 cP. CCS and MRV are looking very good though and we have no evidence of high VII content (small A_Harman index) in PP and QSUD in previous formulations.