Specs for Castrol Syntec SL/CF from 2001:
0w-30 5w-30 10w-30 5w-50
Specific Gravity 0.84 0.85 0.85 0.85
Viscosity @40 C 56 53 70 120
Viscosity @100 C 10.5 9.8 11.5 19.5
Viscosity @-25 C 2750 2400 2500 3050
High Shear Vis. 3.1 3.0 3.5 4.8
Viscosity Index 181 172 159 180
Flash Point 210 C 235 C 235 C 241 C
Fire Point 221 C 246 C 246 C 249 C
Pour Point -42 C -39 C -33 C -39 C
Sulphated Ash 0.9 0.9 1.04 0.93
Zinc 0.10 0.10 0.11 0.11
Phosphorus % Wt. 0.09 0.09 0.09 0.09
Sulfur % Wt. .028 0.29 0.29 0.28
Please note that the low temperature viscosity is at -20 C for the 10w-30 and done at -30 C for the 0w-30. Castrol does not give a TBN. Also the 5w-50 is rated by the ACEA as A3/B3. I think the others are only A1/B1. If I can find the spec sheet for the 10w-40 I will post those numbers. I believe it is rated ACEA A3/B3 B4-98.
[ November 20, 2002, 04:15 AM: Message edited by: NevadaDesert ]