Quote Originally Posted by locoroco777 View Post
how will the common people know if whats the kinematic viscosity of the oil their buying? because last time I checked, none is written on the label, whats there is only the API rating, and winter temp and viscosity rate...
you could search it in the net. e.g. below, i just googled that this minute


Castrol GTX
Method 5W-20 5W-30 10W-30 10W-40 20W-50
Viscosity * 100C, cSt ASTM D445 9.1 10.7 11.31 14.3 18.09
Viscosity * 210F, SUS ASTM D2161 56.1 61.7 63.9 75.2 90.4
Viscosity * 40C, cSt ASTM D445 51.77 64.31 75.1 108.3 159.1
Viscosity Index ASTM D2270 158 157 142 133 126
Low Temperature (C) Cranking
Viscosity, cP max. ASTM D5293 6,600 * -30 6,600 * -30 7,000 * -25 7,000 * -25 9,500 * -15
Low Temperature (C) Pumping
Viscosity, cP max. ASTM D4684 40,000 * -35 40,000 * -35 50,000 * -30 60,000 * -30 60,000 * -20
HT /HS Viscosity, cP min ASTM D4683 2.6 2.9 2.9 2.9 3.7
Pour Point, F (C) max ASTM D97 -44 (-42) -38 (-39) -22 (-30) -27 (-33) -27 (-33)
Flash Point, PMCC, C min ASTM D93 >200 >200 >200 >200 >200
Density * 15C, Relative ASTM D4052 0.862 0.862 0.878 0.887 0.884
Pounds per Gallon 7.18 7.180 7.314 7.387 7.364

* Due to continual product research and development, the information contained herein is based on products purchased in the U.S. subject to change without notification. Typical
properties may vary slightly.