Oil viscosity chart
 

An internet friend sent me this chart . It pretty much backs up what I've been saying all along about the poor cold performance of some 15w-40's out there and even the Mobil Delvac 5w-40 vs the Mobil 0w-40 when used in gasoline engines . Some of these oils are grease :-D at very low temps .

I once heard an oil pump say OUCH :-X22 Well I actually heard that from another oil pump who heard it from a bearing :D

Enjoy !

Delvac1 * 1300S * Delo400 * PenzLL * Rotella * Syntec * Esso XD3 *

5w40 * 15w40 * 15w40 * 15w40 * 15w40 * 5W50 * 0w30 *

-20 6339 11422 13924 9125 9347 4247 2962 3767

-10 2430 3950 4581 3313 3371 1836 1250 1624
0 1066 1592 1776 1389 1406 886 595 783

10 523 729 788 656 662 469 313 415

20 282 371 391 342 344 269 179 238

30 164 206 213 194 194 164 109 146

40 102.0 123.0 125.0 118.0 118.0 106.4 71.0 94.5

50 67.1 78.2 78.5 76.1 76.0 72.2 48.4 64.3

60 46.2 52.4 52.1 51.6 51.4 51.1 34.5 45.6

70 33.2 36.8 36.2 36.5 36.4 37.4 25.4 33.5

80 24.6 26.8 26.2 26.8 26.7 28.3 19.4 25.4

90 18.9 20.2 19.6 20.3 20.2 21.9 15.1 19.7

100 14.8 15.6 15.1 15.8 15.7 17.4 12.1 15.7

110 11.9 12.4 11.9 12.6 12.5 14.1 9.9 12.7

120 9.7 10.0 9.6 10.2 10.2 11.6 8.2 10.7

130 8.1 8.3 7.9 8.5 8.4 9.7 6.9 8.8

140 6.8 6.9 6.6 7.1 7.1 8.3 5.9 7.5

150 5.9 5.9 5.6 6.1 6.0 7.1 5.1 6.5

T(C) M1 0W40 * GC 0W30 * M1 0W30 * M1 5W30 * M1 10W30 * M1 0W20 * RL 5W20
-20 2661.5 2609.0 1994.8 2225.1 3424.8 1712.7 2995.8
-10 1197.8 1127.1 872.4 944.7 1332.9 730.8 1165.3
0 599.3 546.6 428.3 452.9 595.7 352.8 521.4
10 327.6 291.8 231.3 240.1 298.3 188.5 261.8
20 192.9 168.8 135.3 138.3 164.1 109.5 144.5
30 121.0 104.4 84.6 85.5 97.6 68.3 86.3
40 80.0 68.4 56.0 56.0 62.0 45.1 55.0
50 55.4 47.0 38.8 38.5 41.6 31.3 37.0
60 39.8 33.7 28.1 27.7 29.2 22.6 26.1
70 29.7 25.0 21.0 20.6 21.4 17.0 19.2
80 22.7 19.1 16.2 15.8 16.1 13.1 14.5
90 17.8 15.0 12.8 12.4 12.5 10.4 11.3
100 14.3 12.0 10.3 10.0 10.0 8.4 9.1
110 11.7 9.8 8.5 8.2 8.1 6.9 7.4
120 9.8 8.2 7.1 6.9 6.7 5.8 6.1
130 8.2 6.9 6.0 5.8 5.7 5.0 5.2
140 7.0 5.9 5.2 5.0 4.9 4.3 4.4
150 6.1 5.1 4.5 4.3 4.2 3.7 3.9
HTHS 3.6 3.6 3.0 3.1 3.2 2.6 3.3