Bottom of the (Pure) barrel?

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I have seen it in many different brands that have sat on the shelf for a while. Sometimes even giving them a good shake will not dissolve it. I just assume its additives that have settled to the bottom.
I personally have observed it in M1, PUP, Redline, Quaker State. I do not seem to recall it in Amsoil. Maybe somebody should scrape up a sample and send it in for UOA ?
 
Originally Posted by PimTac
This happens every winter. It gets cold. Stuff settles.

Shake your jugs before opening


I agree to shake it, but don't break it
And see if you can get fries with that shake

Ok, 7th grade over
 
I posted this the other day in response to a similar question...

Originally Posted by TheLawnRanger
If temperature plays a part in the fallout and that oil was used in a car, would the additives just mix back into the oil through circulation and rising temperature when in use?


No. Not necessarily. If (and it's a very big if!) that black gunk has dropped out of fresh engine oil, my money is on it being Moly for two reasons.

First, all of the oil soluble Moly additives (ie NOT molybdenum disulphide) I've played around with are deeply, densely black in colour. They're the only additives like this. VIIs & PPDs are colourless. ZDDPs are a nice clear straw colour. Metallic detergents tend to be oak-brown. Ashless dispersants tend to be reddy-brown. The mish mash of common AOs tend to range from clear yellow to pink.

Second, oil soluble Molys aren't necessarily that soluble. Try and blend just 0.5% of Moly into 99.5% base oil and you can whack it up to whatever temperature you like, and stir for as long as you like and it will point blank refuse to go into solution! The trick to getting Moly in solution is to always blend it in the presence of ashless dispersant. It then goes in a treat!

However what you can definitely do in the lab doesn't always translate to what happens at a commercial blend plant & you do have to be very careful. Certain additives have what you might call a 'creeping appetite' for solvency. You blend the oil and it looks great. However these additives, slowly, over time, 'claim' more of the solvency reserve of the oil. In this situation, the least soluble additive component, gradually gets 'pushed out'. If that component happens to be Moly, then you have a problem...
 
Originally Posted by rekit
What is it? If it's part of the package shouldn't I want it in my engine?


that's always MY thoughts.

Molybdenum disulfide additive is known to settle out - - I'd definitely want that additive in my engine, not in the jug.
 
Originally Posted by Gokhan
Yikes, that oil would never go into my car.
sick.gif


How would you know until it was already in your car?
Originally Posted by Vern_in_IL
I doubt this will re-suspend by just shaking the bottle, more likely it will plug up the oil filter! Maybe even cause bearing damage if you prefill your oil filter!

You would need to put the oil into a blender to mix it good enough. First pass the oil filter will remove these "solid partials" (maybe it's actually PTFE?) it might not even be part of the add pack, a contamination defect, I would return.

Return what? The empty jug?

Plug the oil filter? Bearing damage? Maybe you will grow a unicorn horn if you drink it, too!
 
Originally Posted by rooflessVW

Plug the oil filter? Bearing damage? Maybe you will grow a unicorn horn if you drink it, too!


Hey, it's worth a try!
grin2.gif


yeah, those scenarios are all pretty "Far-Fetched"
 
Originally Posted by PimTac

Shake your jugs before opening


My wife does all the oil shopping at WalMart. I always shake her jugs for her, every time I can.
 
Originally Posted by gfh77665
Originally Posted by PimTac

Shake your jugs before opening


My wife does all the oil shopping at WalMart. I always shake her jugs for her, every time I can.


[Linked Image]


I drain to 1/2 quart remaining then shake the stuff back into suspension. Noticed this with PZ LL 15w40 15 years ago, and they're still doing it.
 
Originally Posted by OILJUNKIE
I use Pennzoil Ultra does this mean I should shake my car before I start it every morning?

A cute thought, but don't worry, your engine will do a fine job "shaking" the oil for you. . .
 
Originally Posted by Gokhan
Yikes, that oil would never go into my car.
sick.gif



Pennzoil Ultra Platinum is a high quality oil, thousands of people use it with no problems.
 
If it's potentially as difficult to re-dissolve as Son of Joe says, then it should end up trapped in your oil filter, right? If a few particles make it through or around the filter into bearings, what then? Hard enough to damage bearings, or not?
 
How long is the typical shelf life of this oil? This issue seems to come up often. It should stay suspended on the Tractor Trailer, so it makes me wonder how long has this stuff been sitting in the Penzoil Warehouse?

perhaps we can date this jug to see how long it has to set to settle out.
 
Originally Posted by passgas55
I would just shake it up! Now my question would be these 55 gallon drums at quick lube places.


You know they guy who overtightens your drain plug?
He's the one who shakes the 55 gallon drums until the solids go back into suspension.
 
Originally Posted by Vern_in_IL
How long is the typical shelf life of this oil? This issue seems to come up often. It should stay suspended on the Tractor Trailer, so it makes me wonder how long has this stuff been sitting in the Penzoil Warehouse?

perhaps we can date this jug to see how long it has to set to settle out.

Pennzoil says 4 years for all their motor oils. They also say that additives should stay suspended.

Quote
https://www.pennzoil.com/en_us/service/all-yellow-faq.html
Do the yellow bottles have a longer shelf life?

All Pennzoil motor oils can have a shelf-life of up to four years if stored properly and it is not necessary to shake the motor oil bottle before dispensing. Our formulations are carefully balanced so that the additives stay suspended within the motor oil. You can contact the Pennzoil helpline (1-800-BESTOIL) if you wish to identify the date of when your purchase was bottled.


Years ago I called the Mobil support line asking about the shelf life of Mobil 1. The customer service person said it should last indefinitely, and joked (or at least I though it was a joke) that it would last longer than the bottle. However, I remember reading about Mobil's Super warranties, and they have a bunch of caveats. One is that the oil can't be put in service more than 5 years after purchase (not sure how they prove that) and that it has to be changed at least every 6 months. It sounds like it supersedes their terms that a longer manufacturer's recommendation is covered, but I guess not if it's longer than 6 months.

Quote
https://mobiloil.com/en/article/warranties/limited-warranty/mobil-super-oil-warranty
The Mobil Super and Mobil Superâ„¢ High Mileage limited warranties are valid for 5,000 miles or your vehicle's OEM recommended oil change interval, whichever is longer.

The Mobil Superâ„¢ Synthetic limited warranty is valid for 7,500 miles or your vehicle's OEM recommended oil change interval, whichever is longer.

Additional requirements for all Mobil Super products include: 1) Oils must be put in service not later than five (5) years from the date of purchase; and 2) an oil change must be completed every six (6) months.
 
Valvoline says it never expires:
Quote
Does motor oil expire? If not, how long does motor oil generally last?

Valvoline motor oils do not have documented expiration dates. When stored under optimal conditions, the product remains stable for an extended period of time. It can be used as long as the American Petroleum Institute (API) rating on the label continues to meet or exceed the requirements listed in your car's owner's manual. If the rating is still current, we advise you shake the container before use to blend any additives that may have settled.


Mobil says Mobil 1 is 5 years:
Quote
Does Mobil 1â„¢ synthetic motor oil (in an unopened quart) have any sort of shelf life, like conventional motor oil?

ExxonMobil recommends a five-year maximum shelf life for engine oils, including Mobil 1â„¢ synthetic motor oil.
 
The stuff that settles on the bottom of the containers looks like MOS2 it you've ever used that stuff. That's always been my best guess,that it's moly.
 
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