I too a 4X4 frontier 2012. Any name brand OTS mineral or synthetic will work fine.
I use a 10W30 in summer and a 0W30 in winter because of winter temps.
I would be more concerned about the tranny, especially if it has the original NissanMatic S.
Originally Posted By: MoleKule
After I purchased my used 2012 Nissan Frontier (~ = 33,000 miles), I immediately changed all fluids including the ATF (described elsewhere on BITOG). Tranny shifted fine.
The fluid on the dipstick appeared only slightly off color, but what came out of the transmission sump looked similar to a thick 5W20 mineral oil that had been run in an engine for 20k.
Much darker than the OP's fluid pic.
After a complete fluid replacement, the tranny still shifts well and of last check, the fluid is still cherry red. I sampled it recently so a UOA is forthcoming.
www.bobistheoilguy.com/forums/ubbthreads.php/topics/4109902/ATF_brown_color,_smells_sweet;#Post4109902