Why does gear oil stink?

Kinja'd!!! by "Rusty Vandura - www.tinyurl.com/keepoppo" (rustyvandura)
Published 07/10/2017 at 18:38

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Replies (31)

Kinja'd!!! "MM54" (mm54mk2)
07/10/2017 at 18:41, STARS: 0

Synthetic doesn’t stink nearly as bad - that’s grounds for me to use it wherever possible.

Kinja'd!!! "Daily Drives a Dragon - One Last Lap" (ddadragon)
07/10/2017 at 18:43, STARS: 0

Doesn’t it have more sulfur for wear purposes

Kinja'd!!! "EL_ULY" (uly)
07/10/2017 at 18:48, STARS: 0

Especially when you have to do all 3 diffs on a Toyota LC Lexus LX that is super hot and the customer is waiting. Worst smell

Kinja'd!!! "Berang" (berang)
07/10/2017 at 18:48, STARS: 1

That’s what oil smells like. You ever drive through an oil town? That’s what half of Texas smells like.

Kinja'd!!! "Demon-Xanth knows how to operate a street." (demon-xanth)
07/10/2017 at 18:53, STARS: 2

This gear oil has a new grape scent!

https://www.amazon.com/ACDelco-10-4016-75W-90-Synthetic-Axle/dp/B000QGOX1A

I am seriously not making this shit up.

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Kinja'd!!! "crowmolly" (crowmolly)
07/10/2017 at 19:00, STARS: 0

High sulfur content for anti-wear.

Kinja'd!!! "Urambo Tauro" (urambotauro)
07/10/2017 at 19:02, STARS: 0

This stuff’s still fake, though... I think. For now, anyway.

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Kinja'd!!! "jimz" (jimz)
07/10/2017 at 19:09, STARS: 5

gear oil- especially that meant for hypoid gears like in a differential- can experience a tremendous amount of shear; the oil is squeezed between two surfaces sliding across each other with an enormous amount of force. the anti-shear extreme pressure (EP) additives contain a ton of sulfur, which gives it its characteristic stink.

Kinja'd!!! "jimz" (jimz)
07/10/2017 at 19:10, STARS: 0

while crude oil does have sulfur in it, it’s not why gear oil stinks. even full synthetic gear oil smells; it’s because the extreme-pressure (EP) shear-stabilizing additives contain sulfur.

Kinja'd!!! "McMike" (mcmike)
07/10/2017 at 19:15, STARS: 1

I changed motorcycle fork oil at 40K miles, and I thought I was going to throw up.

Kinja'd!!! "Berang" (berang)
07/10/2017 at 19:18, STARS: 0

Smells the same to me.

Kinja'd!!! "for Michigan" (formichigan)
07/10/2017 at 19:52, STARS: 0

I like the smell of gasoline and motor oil. Brake fluid and gear oil are nasty though.

Kinja'd!!! "Demon-Xanth knows how to operate a street." (demon-xanth)
07/10/2017 at 20:36, STARS: 1

If they made seasonal scent motor oil, people would actually get it changed.

Kinja'd!!! "Rusty Vandura - www.tinyurl.com/keepoppo" (rustyvandura)
07/10/2017 at 21:03, STARS: 0

Just used some, and it was pretty stinky.

Kinja'd!!! "Rusty Vandura - www.tinyurl.com/keepoppo" (rustyvandura)
07/10/2017 at 21:03, STARS: 0

I’m sure that I do not know...

Kinja'd!!! "Rusty Vandura - www.tinyurl.com/keepoppo" (rustyvandura)
07/10/2017 at 21:04, STARS: 0

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Kinja'd!!! "Rusty Vandura - www.tinyurl.com/keepoppo" (rustyvandura)
07/10/2017 at 21:04, STARS: 0

So the icky gear lube smell is primarily sulfur?

Kinja'd!!! "Rusty Vandura - www.tinyurl.com/keepoppo" (rustyvandura)
07/10/2017 at 21:05, STARS: 0

Damn! That’s what I would have used!

Kinja'd!!! "Rusty Vandura - www.tinyurl.com/keepoppo" (rustyvandura)
07/10/2017 at 21:06, STARS: 0

I never would have pegged that as sulfur. Just stinky.

Kinja'd!!! "Rusty Vandura - www.tinyurl.com/keepoppo" (rustyvandura)
07/10/2017 at 21:06, STARS: 0

I lurnt some pin today. Thank you for the explanation!

Kinja'd!!! "Rusty Vandura - www.tinyurl.com/keepoppo" (rustyvandura)
07/10/2017 at 21:08, STARS: 0

When I was a kid, I liked the smell of gasoline. Then in the Army, I became a fuel handler, and wound up disliking the smell of gas and liking the smell of diesel. Kind of sweet smelling...

Kinja'd!!! "E92M3" (E46M3)
07/10/2017 at 21:31, STARS: 1

It’s pretty stanky. Even after you wash your hands the smell lingers for 2 days.

Kinja'd!!! "Frank Grimes" (FrankGrimes)
07/10/2017 at 21:37, STARS: 0

I hate the smell of that stuff its one of those stinks it feels like it gets into the back of my brain.

Kinja'd!!! "Rusty Vandura - www.tinyurl.com/keepoppo" (rustyvandura)
07/10/2017 at 22:41, STARS: 0

Yeah. Mrs. O.C. is complaining about it and the smell on my clothes, which she insisted I remove and leave in the washing machine in the garage.

Kinja'd!!! "Scary__goongala!" (corymagee)
07/10/2017 at 23:03, STARS: 1

First time I ever smelled used gear oil was when I changed the diff oil in my NA for the first time. Stuff was grey and nasty smelling.

Kinja'd!!! "CaptDale - is secretly British" (captdale)
07/11/2017 at 13:04, STARS: 0

GM’s synth is the worst. They added fake grape scent to it to make it better, but it is worse. Fake grape and gear oil smell mixed together *puke*

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Kinja'd!!! "thejustache" (thejustache)
07/11/2017 at 15:38, STARS: 0

I had almost the opposite reaction... I came in smelling like gear oil the other day and my wife told me the smell reminded her of her dad who worked as a machinist for GM for years. I couldn’t wait to change out of the smelly clothes but she actually like it!

Kinja'd!!! "Rusty Vandura - www.tinyurl.com/keepoppo" (rustyvandura)
07/11/2017 at 17:22, STARS: 0

As long as you don’t drink it, it’ll be okay.

Kinja'd!!! "Rusty Vandura - www.tinyurl.com/keepoppo" (rustyvandura)
07/11/2017 at 17:23, STARS: 0

That’s a nice story.

Kinja'd!!! "CaptDale - is secretly British" (captdale)
07/11/2017 at 17:24, STARS: 0

But it mixes so well with vodka

Kinja'd!!! "Rusty Vandura - www.tinyurl.com/keepoppo" (rustyvandura)
07/11/2017 at 17:48, STARS: 1

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Maybe try some of this on the differential?