im gonna service my trans oil w/4qts of oem gl-4 75w-85 i bought from the nissan dealership and they gave me pennzoil 80w-90 2qts for the rear diff. the sales tech said thats what they use 2 sevice their 350z's with.i know theres many out there for the rear diff jus to name a few: valvoline, mobil1, royal purp, and so on. anyone know about pennzoil 80w-90 for rear diff? any input would be appreciated. thanks.

 

Pennzoil is a reputable brand. Is it synthetic? You'd be better off with a synthetic for trans and diff.

 

i went with amsoil for my tranny and diff. change am about to do in a few days. i used this for reference http://www.amsoil.com/mygarage/Produ.../DATSUN+350Z+2

and then printed out all the DIY in the threads for guides