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Which puts us back to square-one! There appears to be NO consensus about fluids. This person runs GL-1, that person runs GL-5, one guy uses 30w, another uses 15w-40... No wonder I'm confused!

lmao

The "Red Label" looks as though its 30w not 40w per their website. The "Blue Label" appears to be 40w and it doens't specifically list the oil as "non-detergent" as the red labelled 30w did. Clarification needed please.

Ok, so: Motor Oil: 15w-40 (Non-Detergent??) Transmission & Transfer Case: 40w Oil (Yellow Metal Safe??) Differentials: GL-5 ??w-90 I've already purchased the 80w-90 from Napa and I'll try to return the fluid tomorrow. However, if they only allow an exchange, I reckon I'll ask them to find...

Ah'. Forgive me, I literally just bought my truck and want to change the fluids and I def' want to but the proper stuff in it. I've never heard of "STRAIGHT 40w" before, excuse my ignorance. How is that different than 15w-40?

Just so we are clear... I should try and return the 80w-90 gear-oil to Napa and get non-detergent 15w-40 motor-oil for my differentials which will also run in the motor? Will 15w-40 work anywhere else? I'd love to consolidate the required oils so I wouldn't need so many!

I am asking if the oil in the photo is the right-stuff for my differential(s) fluid. I forgot to include that on my post via iphone, sorry.:?

Anyone?

I hope this is the stuff! 80w-90 per their website, GL-1, and a bunch of it! I hope this is the "stuff"...