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differential oil, heat #4487178
08/13/17 09:02 AM
08/13/17 09:02 AM
Joined: Aug 2017
Posts: 1
Rancho Cordova,Ca
LAT Offline OP
LAT  Offline OP
Joined: Aug 2017
Posts: 1
Rancho Cordova,Ca
I have a BMW Z3 3.0l. I had some quarts of Lubrication Engineers ISO 110, leftover from my previous S2000 which had been recommended.
Does anyone know if this is good, bad, or adequate? interesting info is posted on Youtube.
Also diff is quite hot to the touch after a long drive, is this normal?

Re: differential oil, heat [Re: LAT] #4487189
08/13/17 09:20 AM
08/13/17 09:20 AM
Joined: Dec 2006
Posts: 19,135
Dallas,Tx USA
aquariuscsm Online content
aquariuscsm  Online Content
Joined: Dec 2006
Posts: 19,135
Dallas,Tx USA
Originally Posted By: LAT
Also diff is quite hot to the touch after a long drive, is this normal?


Definitely normal. Mine does the exact same thing.


1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
Quaker State Ultimate Durability 10W30
2012 Honda Accord Coupe EX-L 2.4,auto,San Marino Red
Pennzoil Platinum 5W20

Re: differential oil, heat [Re: LAT] #4487210
08/13/17 09:43 AM
08/13/17 09:43 AM
Joined: Jun 2002
Posts: 19,529
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,529
Iowegia - USA
Since mechanical efficiency is always less than 100%, some of the HP from the engine goes into heating the oil and overcoming friction so differentials will get hot.

If overly concerned, purchase a finned after-market differential cover and replace the old cover and fluid with synthetic gear GL-5 lube.

Last edited by MolaKule; 08/13/17 09:44 AM.

Scars remind us of where we have been, but do not have to dictate where we are going.
Re: differential oil, heat [Re: MolaKule] #4487228
08/13/17 10:12 AM
08/13/17 10:12 AM
Joined: Sep 2010
Posts: 7,512
Texas & Global
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 7,512
Texas & Global
I do that on pickup rear ends somewhat for the cooling - but they tend to up the gear oil capacity as well.
Mine has drain, vertical fill (fill from bottle, no pump) and an oil level "tattle tell" port - all easy to get to ...
Lastly - this puts machined on machined gasket faces - gets rid of the flimsy stamped cover - never leaks.


2018 Chevy 1500 Z71 4WD
2017 Chevy Tahoe LT 4WD
2014 Fusion Hybrid Titanium
2013 Cruze LTZ - RS Turbo

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