Originally Posted By: jake88
So, getting at the point of the question, given a synthetic blend 5W30 and 10W30, the 10W30 is likely to have higher viscosity at operating temperatures because the oil starts out thicker and relies less on polymer thickening (so it is more shear-stable). Does that clarify anything?
Please comment on these 2 specific oils. According to the car oil chart, the 10W30 is rated for ambient temperature 40C. The 5W30 is for 10C only.
MACH 5 SL 10W-30
Density @ 15°C, kg/l 0.864
Pour Point, °C -33
Flash Point, °C 228
Kinematic Viscosity, cSt
@ 40 °C 73
@ 100 °C 11.2
Viscosity Index 145
Cold Cranking Visc, cP
@ - 15 °C 4,200
Sulphated Ash, %wt 0.82
TBN, mg KOH/g 6
ASTM Colour 3.0
******************
Characteristics 5W-30
Density @ 15 °C, kg/l 0.854
Pour Point, °C -40
Flash Point, °C 215
Kinematic Viscosity, cSt
@ 40 °C 62.3
@ 100 °C 11.1
Viscosity Index 174
Cold Cranking Visc, cP
@ -30 °C 6.472
Sulphated Ash, %wt 0.83
TBN, mg KOH/g 6.4
ASTM Colour L2.5
Thanks.
So, getting at the point of the question, given a synthetic blend 5W30 and 10W30, the 10W30 is likely to have higher viscosity at operating temperatures because the oil starts out thicker and relies less on polymer thickening (so it is more shear-stable). Does that clarify anything?
Please comment on these 2 specific oils. According to the car oil chart, the 10W30 is rated for ambient temperature 40C. The 5W30 is for 10C only.
MACH 5 SL 10W-30
Density @ 15°C, kg/l 0.864
Pour Point, °C -33
Flash Point, °C 228
Kinematic Viscosity, cSt
@ 40 °C 73
@ 100 °C 11.2
Viscosity Index 145
Cold Cranking Visc, cP
@ - 15 °C 4,200
Sulphated Ash, %wt 0.82
TBN, mg KOH/g 6
ASTM Colour 3.0
******************
Characteristics 5W-30
Density @ 15 °C, kg/l 0.854
Pour Point, °C -40
Flash Point, °C 215
Kinematic Viscosity, cSt
@ 40 °C 62.3
@ 100 °C 11.1
Viscosity Index 174
Cold Cranking Visc, cP
@ -30 °C 6.472
Sulphated Ash, %wt 0.83
TBN, mg KOH/g 6.4
ASTM Colour L2.5
Thanks.