5W-30 is the general recommendation.
10W-30 is OK if it doesn't get too cold (Below 0º F)
If you use synthetic, you can go higher in upper viscosity, 5W-50 if you want. (But not with dino juice, weights higher than 30 tend to form sludge)
So go change your oil now that you have our blessings!
_________________________
- TJ
2001 Xterra '03 VG33, SE 5 spd, 305/70/16's, Revolvers, UBSkidderz, Doubled AAL's, 3"SL/2"BL, winch/bumpers, skids, sliders, OBA, Snorkel, pine stripes....
Friends don't let friends drive stock.
http://www.gifsoup.com/view/501230/tj-tackling-crawlers-ridge-o.gif