0w40 oil year round?
#3
depends, year round if its below zero all the time. If not hell to the no... If you are above say 20 degrees most use 15-40 if not then 0-40 I use 15-40 all year round and it gets to the -30 down here. But I have a oil pan heater to help whe I first start the truck because the oil is a thick as molases..
#6
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