Differential Fluid, which do you use?
5th Gear
Joined: Mar 2020
Posts: 5
Likes: 0
We use Redline 75w/140 straight out of the bottle in stock differentials around here and you don't really want to know what we think about that over-priced, stinky snot GM calls differential lubricant... We've tested that lube in the past for HP use w/ added power, racing applications, etc. and it failed miserably in every instance for the areas of use that these HP differentials typically live in.
We still see folks insist on using it for HP applications and we just cringe when we see that, knowing that the differential is screaming for dear life back there.... It might be fine for a 100% stone-stocker car, but that's about it and we wouldn't suggest that lube for *anything* other than grocery-getting type driving...ever.
To each his own though.
DTE
We still see folks insist on using it for HP applications and we just cringe when we see that, knowing that the differential is screaming for dear life back there.... It might be fine for a 100% stone-stocker car, but that's about it and we wouldn't suggest that lube for *anything* other than grocery-getting type driving...ever.
To each his own though.
DTE
Heel & Toe
Joined: Oct 2021
Posts: 22
Likes: 1
Last time I used Pennzoil 90 weight synthetic diff oil that has the friction modifiers already in it. No problems, however, I had to remove the dog tag from the filler bolt and use an oil safe teflon tape to prevent the filler hole from spraying oil all over the back of the car on long highway drives.
