Quote:
Originally Posted by JARblue
... I've always put 75w90 in my diff. Since 2011. Never seen an 80w90 gear oil recommendation documented.
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I bought a 2019 sport coupe with the 6MT and the Nissan owner's manual specs an 80W-90 conventional super hypoid GL-5 gear lube for the diff. I changed it out with Redline 75W-90 diff oil and the driveline friction is noticeably less.