Quote:
Originally Posted by Bill Verburg
You people will apparently believe anything that any fool posts 
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What fool do you mean?
See the TDS of known oil companies (example table of products sold in germany below) do state that the cold viscosity of i.E 10w60 (bottom of table) is even higher than 20w50:
Code:
Name Visko.(mm²/s)/40°C Visko.(mm²/s)/100°C API ACEA Porsche Freigabe
———————————————————————————————————————————————————————————————————————————————————————————————————————————————-
5w40 Beispiele
———————————————
CASTROL GTX 5w40 78,0 13,2 SM A3/B4
Mannol Extreme 5w40 79,2 13,3 SN A3/B4 A40
Liqui M. LL High Tech 5W-40 80,5 14,0 SN A3/B4 A40
Meguin High Cond. SAE 5W-40 80,5 14,0 SN A3/B4 A40
Motul 6100 SYNERGIE 5w-40 85,3 14,1 SN A3/B4
Mobil Super 3000 X1 5W-40 84 14,1 SN A3/B4 A40
CASTROL EDGE 5W-40 vollsynth. 75,0 13,0 SN C3
Mannol Elite 5W-40 vollsynth. 80,5 13,5 SN A3/B4 A40
Liqui M. HT. 5W-40 vollsynth. 90.2 14,5 SM A3/B4 A40
Meguin SAE 5W-40 vollsynth. 90.2 14,5 SM A3/B4 A40
Motul 8100 5w-40 vollsynth. 84,7 14,1 SN C3 A40
15w40 Beispiele
———————————————
Castrol GTX 15W-40 102 14.3 SL A3/B3
Mannol Universal 15W-40 105 13,9 SG -
Liqui M. Touring HT 15W-40 101 14,4 SL A3/B4
Meguin HD-C3 SAE 15W-40 101 14,4 SL A3/B4
Motul 4000 15w-40 110 14,6 SL A3/B4
Mobil Super 1000 X1 15W-40 107 14,4 SL A3/B3
5w50 Beispiele
———————————————
CASTROL Edge 5w50 vollsynth. 109,7 17,87 SN A3/B4
Mannol 5w50 HC-Synth.. 99,1 16,6 SN A3/B3
Liqui M. 5W-50 vollsynth. 117 18,5 SJ A3/B3
Meguin SuperLL 5w50 vollsynth. 122 18,7 SM A3/B4
Motul SPORT 5w50 vollsynth. 107,1 17,9 SM -
Mobil 1 FS x1 5W-50 vollsynth. 101 ??? SN A3/B4 A40
20w50 Beispiele
———————————————
Castrol Classic XL 20W-50 153 17,3 SF -
Mannol Safari 158 18 SL -
Liqui M. Touring HT 20W-50 153 18,1 SL A3/B4
Meguin Universal SAE 20W-50 153 18,1 SL A3/B4
Motul CLASSIC 20W-50 164 18 SF
Mobil Super 1000 20W-50 146 17,8 SL -
10w60 Beispiele (vollsynth.)
———————————————
Castro Edge Synth 10w60 160 22,7 SN A3/B4
Mannol 10w60 165 22,3 SN A3/B4
Liqui Moly Syn 10w60 168 24 SL A3/B4
Meguin Racer 10w60 168 24 SL A3/B4
Motul 8100 X-POWER 10W-60 163,4 23,5 SN A3/B4
Mobil 1 Extended Life™ 10W-60 152,7 22,7 SN A3/B4
https://d23zpyj32c5wn3.cloudfront.net/images/product_descriptions/technical_data_sheets/45555/4100_Power_15W50_08.pdf?1492017270
Here the Motul 15w50 comes with 154 mm²/s at 40°C means same cold viscosity like most 20w50. And thats what Im only refering to: the cold viscosity in mm²/s which affects the flow speed of the fluid to reach important parts on cold starts as of the thread starter is talking about using it in NE areas.
I dont know which brands exactly do provide their 15w50 with such a high mm²/s vaue at cold temps, but at least someone should check.