REDLINEとSUNOCO

その薀蓄を是非ともお聞きしたいのですが・・・。
HTHSが絡んでくるのでしょうか。

ご推察のとおり。

データーではこんな数値になってます。ご参考まで。
＃３０
3.6 Nutec NC-40 5w-30
3.8 RedLine High Performance Motor Oil 5w-30
3.8 RedLine High Performance Motor Oil 10w-30

＃４０
3.49 Valvoline Dura Blend MXL 部分合成　5w-40
3.6 Mobil Mobil1 Race Proven 0w-40
3.68 Shell Helix Ultra 5w-40
3.7 Castrol Formula RS Zero 0w-40
3.8 76Lubricants Pure Synthetic 5W-40
3.9 Pennzoil Platinum Synthetic European Formulation 5w-40
3.92　Motul　8100　5w-40
3.92 Kygnus Ban Green 10w-40
4 Kygnus Ban Premium 5w-40
4.07 Silkolene Pro S 5w-40
4.1 Havolin 5w-40
4.1 Mobil Mobil1　DE 5w-40
4.19 Motul 300V Chrono 10w-40
4.2 AMS OIL European Car Formula 5w-40
4.2 Gulf Roadster 5w-40
4.2 Gulf M-Sport 5w-40
4.4 76LubricantsGuardol QLT Motor Oil 15W-40
4.51 Motul 300V Power 5w-40
4.6 RedLine High Performance Motor Oil 5w-40
4.65 SUNOCO X POWER 12.5W-40 91.56/14.17
4.7 RedLine High Performance Motor Oil 10w-40
4.7 RedLine High Performance Motor Oil 15w-40
5.0 PERFORMAXRacing 10W-40

＃５０
4.6 Gulf FLAT4&6 5w-50
4.7 Mobil Mobil 1 RF 5W-50
4.8 Gulf Evo 10w-50
4.9 AMS OIL High Performance Motor Oil 20w-50
5.1 Gulf RE Special 10w-50
5.1 Gulf Classic MINI 20w-50
5.11 Mobil Mobil1 Turbo 15w-50
5.11 Silkolene Pro S 10w-50

番外
7.65 SUNOCO　R-Brend　20W-60