CJ3Flyr Super Moderator Nov 30, 2009 #2 It varies... If you follow Toyota and you tow they suggest 15k. If you don't tow they say never. Obviously it's messed up. You can read it for yourself here: Toyota Parts and Service Many have chosen Mobil1 or Amsoil with a 30-60k ( or longer) interval. I like doing it once, early and then every 45k-60k with a good synthetic. Don't forget the t-case http://www.toyota-4runner.org/maint...ial-fluid-change.html?perpage=40&pagenumber=1 & http://www.toyota-4runner.org/maint...ntial-transfer-case-fluids-pics-included.html
It varies... If you follow Toyota and you tow they suggest 15k. If you don't tow they say never. Obviously it's messed up. You can read it for yourself here: Toyota Parts and Service Many have chosen Mobil1 or Amsoil with a 30-60k ( or longer) interval. I like doing it once, early and then every 45k-60k with a good synthetic. Don't forget the t-case http://www.toyota-4runner.org/maint...ial-fluid-change.html?perpage=40&pagenumber=1 & http://www.toyota-4runner.org/maint...ntial-transfer-case-fluids-pics-included.html