Originally Posted by burla
IMO any grading of base oils you need the third corner of that triangle, cSt, NOACK, and HTHS.
Or since the cSt determination has nothing to do with how an oil will operate long term, just use NOACK and HTHS. Wouldn't we want to test base oils as in what happens to them in real world applications over time, or just more of what the oil does in a virgin state?
It's CCS (cold-crank simulator) viscosity measured at very low temperatures in cP units, not KV100 in cSt units.
HTHSV is not a property of the base oil alone. It's the property of the finished oil that also has the viscosity-index improver (VII).
Being thicker (higher HTHSV) or thinner (lower HTHSV) doesn't make an oil superior or inferior. It's merely a spec that you need to follow according to the given recommendation.
If you're asking about the VII content, there is a separate index called A_Harman index, which correlates with the percentage VII content. Here is a table:
Code
Oil Density KV40 KV100 KV150 HTHSV VI DV150 A_Harman index
Delvac S1300 15W-40 CK-4/SN 0.874 109.00 14.10 5.32 4.10 4.11 0.996
M1 AP 5W-20 0.850 48.88 8.20 3.53 2.60 141 2.66 0.979
PPPP 10W-30 0.841 60.50 10.10 4.29 3.10 151 3.19 0.971
M1 HM 5W-20 0.856 50.00 8.60 3.72 2.70 150 2.82 0.958
Shell Rotella T4 15W-40 0.878 113.72 14.84 5.68 4.20 4.41 0.952
M1 T&S 5W-20 0.852 48.84 8.44 3.66 2.62 150 2.76 0.949
M1 EP 0W-20 0.839 44.90 8.60 3.85 2.70 173 2.86 0.944
PPPP 5W-30 0.839 53.90 9.80 4.28 3.00 170 3.18 0.944
PPPP 5W-30 dexos1 Gen 2 0.839 53.90 9.80 4.28 3.00 170 3.18 0.944
M1 5W-20 0.852 49.80 8.90 3.89 2.75 160 2.93 0.938
M1 EP 5W-20 0.850 49.60 8.90 3.90 2.75 161 2.93 0.937
Amsoil SS 5W-30 0.855 59.70 10.30 4.41 3.11 3.34 0.932
M1 0W-20 0.841 44.80 8.70 3.91 2.70 177 2.91 0.928
M1 HM 10W-30 0.861 78.00 12.10 4.96 3.50 3.78 0.926
Amsoil XL 5W-30 0.855 62.90 11.10 4.77 3.30 3.61 0.914
M1 AP 0W-20 0.840 45.69 8.70 3.89 2.60 172 2.89 0.899
PUPPP 5W-30 0.841 56.30 10.30 4.50 3.00 173 3.35 0.896
M1 T&S 0W-20 0.842 46.34 8.85 3.96 2.61 175 2.95 0.884
M1 EP 5W-30 0.851 59.80 10.60 4.57 3.00 169 3.44 0.872
Pennzoil HM 10W-30 0.871 78.80 11.80 4.79 3.20 144 3.69 0.867
M1 FS 0W-40 0.846 70.80 12.90 5.56 3.60 185 4.16 0.865
Shell Rotella T6 5W-40 CJ-4 0.858 86.94 14.09 5.80 3.80 4.40 0.863
M1 5W-30 0.855 61.70 11.00 4.75 3.10 172 3.59 0.862
M1 ESP Formula 0W-40 0.841 69.00 12.90 5.61 3.53 191 4.18 0.845
TGMO 0W-20 SN MSDS 0.851 36.10 8.50 4.09 2.60 225 3.08 0.844
M1 AP 5W-30 0.851 67.52 11.24 4.74 3.00 160 3.57 0.840
M1 T&S 5W-30 0.852 66.60 11.50 4.90 3.00 169 3.69 0.812
TGMO 0W-20 SN VOA 0.851 36.16 8.79 4.27 2.60 236 3.22 0.808
M1 HM 10W-40 0.860 107.00 16.00 6.37 3.90 4.85 0.804
M1 HM 5W-30 0.856 72.00 12.10 5.09 3.10 151 3.86 0.804
M1 HM 5W-30 0.856 72.00 12.10 5.09 3.10 166 3.86 0.804
IMO any grading of base oils you need the third corner of that triangle, cSt, NOACK, and HTHS.
Or since the cSt determination has nothing to do with how an oil will operate long term, just use NOACK and HTHS. Wouldn't we want to test base oils as in what happens to them in real world applications over time, or just more of what the oil does in a virgin state?
It's CCS (cold-crank simulator) viscosity measured at very low temperatures in cP units, not KV100 in cSt units.
HTHSV is not a property of the base oil alone. It's the property of the finished oil that also has the viscosity-index improver (VII).
Being thicker (higher HTHSV) or thinner (lower HTHSV) doesn't make an oil superior or inferior. It's merely a spec that you need to follow according to the given recommendation.
If you're asking about the VII content, there is a separate index called A_Harman index, which correlates with the percentage VII content. Here is a table:
Code
Oil Density KV40 KV100 KV150 HTHSV VI DV150 A_Harman index
Delvac S1300 15W-40 CK-4/SN 0.874 109.00 14.10 5.32 4.10 4.11 0.996
M1 AP 5W-20 0.850 48.88 8.20 3.53 2.60 141 2.66 0.979
PPPP 10W-30 0.841 60.50 10.10 4.29 3.10 151 3.19 0.971
M1 HM 5W-20 0.856 50.00 8.60 3.72 2.70 150 2.82 0.958
Shell Rotella T4 15W-40 0.878 113.72 14.84 5.68 4.20 4.41 0.952
M1 T&S 5W-20 0.852 48.84 8.44 3.66 2.62 150 2.76 0.949
M1 EP 0W-20 0.839 44.90 8.60 3.85 2.70 173 2.86 0.944
PPPP 5W-30 0.839 53.90 9.80 4.28 3.00 170 3.18 0.944
PPPP 5W-30 dexos1 Gen 2 0.839 53.90 9.80 4.28 3.00 170 3.18 0.944
M1 5W-20 0.852 49.80 8.90 3.89 2.75 160 2.93 0.938
M1 EP 5W-20 0.850 49.60 8.90 3.90 2.75 161 2.93 0.937
Amsoil SS 5W-30 0.855 59.70 10.30 4.41 3.11 3.34 0.932
M1 0W-20 0.841 44.80 8.70 3.91 2.70 177 2.91 0.928
M1 HM 10W-30 0.861 78.00 12.10 4.96 3.50 3.78 0.926
Amsoil XL 5W-30 0.855 62.90 11.10 4.77 3.30 3.61 0.914
M1 AP 0W-20 0.840 45.69 8.70 3.89 2.60 172 2.89 0.899
PUPPP 5W-30 0.841 56.30 10.30 4.50 3.00 173 3.35 0.896
M1 T&S 0W-20 0.842 46.34 8.85 3.96 2.61 175 2.95 0.884
M1 EP 5W-30 0.851 59.80 10.60 4.57 3.00 169 3.44 0.872
Pennzoil HM 10W-30 0.871 78.80 11.80 4.79 3.20 144 3.69 0.867
M1 FS 0W-40 0.846 70.80 12.90 5.56 3.60 185 4.16 0.865
Shell Rotella T6 5W-40 CJ-4 0.858 86.94 14.09 5.80 3.80 4.40 0.863
M1 5W-30 0.855 61.70 11.00 4.75 3.10 172 3.59 0.862
M1 ESP Formula 0W-40 0.841 69.00 12.90 5.61 3.53 191 4.18 0.845
TGMO 0W-20 SN MSDS 0.851 36.10 8.50 4.09 2.60 225 3.08 0.844
M1 AP 5W-30 0.851 67.52 11.24 4.74 3.00 160 3.57 0.840
M1 T&S 5W-30 0.852 66.60 11.50 4.90 3.00 169 3.69 0.812
TGMO 0W-20 SN VOA 0.851 36.16 8.79 4.27 2.60 236 3.22 0.808
M1 HM 10W-40 0.860 107.00 16.00 6.37 3.90 4.85 0.804
M1 HM 5W-30 0.856 72.00 12.10 5.09 3.10 151 3.86 0.804
M1 HM 5W-30 0.856 72.00 12.10 5.09 3.10 166 3.86 0.804