I live in Fairbanks Alaska and my '14 5.7 Hemi HD is about due for an oil change. The winter time temps can dip down to -40 F and regularly are -20 F. I've got a block heater and a heating pad for the oil. Looking at 0W-20 Royal Purple Synthetic, this oil change will take me into winter so I'll need something to handle the cold temps. I haul 2,000 lbs of water in the bed on a weekly basis. Wondering if the 0W-20 would be sufficient.
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