Why is this gear oil so cheap?

usaf2006 · Oct 23, 2016

https://www.amazon.com/Mobil-104361...&qid=1477229120&sr=1-1&keywords=mobil+1+80w90

Is it the right stuff I need for my truck? I don't tow at all.

What does the "LS" on the bottle mean?

Thanks folks.

Bullitt5339 · Oct 23, 2016

That's about $1 cheaper than what I can get it for here locally, so it's not like it's stupid cheap.

The LS designates that it's designed to be used in clutch style limited slip differentials without the need for a friction modifier.

usaf2006 · Oct 23, 2016

Ah gotcha. So since I have a LSD, I wouldn't need to buy the Mopar friction modifier? Or should I just throw some in there to be safe.

And while I'm buying it, is it cool to throw this stuff in the front too? Or should I get non "LS" for the front.

Bullitt5339 · Oct 23, 2016

That's also not the current label for Mobil 1 Synthetic Gear Oil, so they probably bought a ton of it at a reduced price.

I would buy it.

Bullitt5339 · Oct 23, 2016

usaf2006 said:
Ah gotcha. So since I have a LSD, I wouldn't need to buy the Mopar friction modifier? Or should I just throw some in there to be safe.

And while I'm buying it, is it cool to throw this stuff in the front too? Or should I get non "LS" for the front.

You can use this on non-limited slip differentials with no problems.

Pre-spool in my Mustang, I still ran the friction modifier just to be safe.

usaf2006 · Oct 23, 2016

Awesome, Looks like I'll snag up a few quarts of it and get my diffs freshened up.

MTLHEMI · Oct 23, 2016

I used the friction modifier when I changed my diff oil last month. Even though I used the right oil woth the LS designation I still got chatter from the rear. For the cost of the modifier it doesn't hurt to use it too.

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usaf2006 · Oct 23, 2016

Roger that. Sounds good

Bullitt5339 · Oct 23, 2016

MTLHEMI said:
I used the friction modifier when I changed my diff oil last month. Even though I used the right oil woth the LS designation I still got chatter from the rear. For the cost of the modifier it doesn't hurt to use it too.

Sent from my SM-A500W using Tapatalk

Does the Dodge friction modifier smell as bad as the Ford stuff?

I was rebuilding the diff in the Mustang 15 years ago and you're supposed to soak the new clutches in friction modifier for a couple hours before installing them. I put them in an old coffee can, poured a bottle of modifier on them and then waited. My wife wanted to go somewhere, so I closed the garage door and left the house for a few hours with them in there soaking.

As soon as we opened the door to the house when we got back, I realized I had made a huge mistake. The entire house smelled like friction modifier for at least a week. My wife was pissed.

MTLHEMI · Oct 23, 2016

It's some nasty stuff for sure lol

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Why is this gear oil so cheap?

usaf2006

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usaf2006

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