I have a '16 SV KC 4x4 . I will hit 30k miles this summer- I will do a complete fluid change: Transfer case, rear diff, front diff, Auto trans. Everything I research tells me I have to use Nissan ATF - very specific. I do not see any listing for OTC Tranny fluid ( Like Castrol). I would prefer to put synthetic in and not stock Nissan fluid - Are their fluids I can put in w/o messing up tranny?