is just a regurgitation of the owner's manual like not4 says, then the owner's manual says... Above 0 F......10W-30, 10W-40 [1] Above 50 F......20W-40, 20W-50 Below 61 F......5W-30 And the "1" in brackets refers to footnote... "SAE 10W-30 is preferred." So the owner's manual, at the direction of the Nissan engineers, states 10w30 is the correct viscosity formula for temperatures above 0* F. MadKiwi's year-round low temperature as stated at [ http://www.usclimatedata.com/climate/missoula/montana/united-states/usmt0231/2015/1 ] does not fall below 17* F. And his year-round high temperature maximum reaches 86* F (above 61* F).
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