Quote:
Originally Posted by Doc Oc
I think/hope a 0w will pressurize the system quicker and help with the noise but I'd like something a little thicker than m1 which I've seen on uoa's as thin as 11.x at 100c. Redline is in the 14 range, a little closer to tws but still with the cold flow benefits of a 0w. Is there any other 0w40 out there as thick?
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Kinematic viscosity at 100 C is not the best figure for approximating operational viscosity. The oil might be at that temperature in the sump, but in places like the bearings it will be far warmer.
Use the HTHSV to compare operational viscosity. That being said, here are some 0w40 HTHSV numbers:
Red Line: 4.0
Mobil 1: 3.8
Pennzoil Ultra: 3.7
Liqui-Moly Synthoil Energy: 3.6
Royal Purple: 3.6
Motul 300V: 3.9
You want as thin as possible, but as thick as necessary. Without an oil pressure gauge, it's just going to be an educated guess.