All gear oil come with lsd additive now ?

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Back when I change out my diff fluid around 2013 . All gear oil bottle doesn’t say “ contain lsd additive “ now I note mobile 1 and Valvoline say that it contain lsd stuff . So I don’t need buy a small bottle of lsd any more ?
 
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Mobil 1™ Syn Gear Lube LS ?

Valvoline SynPower does, but High Performance does not.

Amsoil Severe Gear doesn't have Limited Slip additive in it, at least the 75w90
 

MetalSlug

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Just because those 2 have it, it does not mean all gear oils come with LSD additive
those are 2 most well know name brand of the shelves that easy to get at any local part store, even walmart, those 2 brand i use the most in my life, so im suprise i saw the new label.
 
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Use the least about of friction modifier needed to eliminate chatter.

Just because a gear oil comes with LS additive doesn't mean its enough.

If you don't have an LS, I'd look for a gear oil without it.
 
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Delvac1 doesn’t. The reason I use it in my 2005 Avalanche G80 locker.
 
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I've been using Quaker State in steel drums for over 20 years and never had to add anything to limited slip differentials.
 
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I've been using Quaker State in the steel drums for over 20 years and never had to add anything to limited slip differentials.
Depends what type of diff you have. A cone type diff requires it as well as some clutch type diffs require FM. A Detroit locker doesnt need it neither does a Wave trac. The best advice is to check your owners manual to verify what type of FM is needed as well as to how much.
 

BlueOvalFitter

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Use the least about of friction modifier needed to eliminate chatter.

Just because a gear oil comes with LS additive doesn't mean its enough.

If you don't have an LS, I'd look for a gear oil without it.
My 07 F150 has an open rear end and I use Valvoline 75W140 synthetic gear oil in it. It has LS additives and my differential is still going strong with 160K miles.
 
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