Hey everyone, sorry if I’m duplicating a thread, I’ve been looking around for the past couple hours, but haven’t found the answer I’m looking for. So any feedback you can offer, I would greatly appreciate. I want to replace my front and rear differential fluid, however Nissan is telling me I have to use their 75/140 oil. I see other guys on TT using 75/140 synthetic by Castrol / Mobile One, etc… Is this OK or do I need to use Nissan’s stuff. I know that is true with the Transmission fluid, but is it true for everything else???