MRV Pennzoil ultra platinum

It’s not just about pumping. At super cold temps, batteries and starters benefit from lower resistance.

It can make the difference between starting and not starting sometimes.
This is a critical point. A thick oil in cold conditions might flow enough to lubricate, but do you have enough starter and battery to overcome the cranking load? Shaft load increases linearly with viscosity, but of course viscosity is exponential with temperature.
 
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