I looked inside my M1 0w20 AFE bottle and this is what I saw. Is this additive precipitation?
The bottle was purchased ~1 year ago.
The bottle was purchased ~1 year ago.
Is this additive precipitation?
- Thread starter camrydriver111
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Probably. Looks like MoS2.
I gently shake oil containers before pouring. I assume any precipitate is good stuff and will at least become suspended in the oil.
It may precipitate out again once it's in the engine but at least it's available to leach back into the oil wherever it's been deposited (oil filter, oil pan, etc)
It may precipitate out again once it's in the engine but at least it's available to leach back into the oil wherever it's been deposited (oil filter, oil pan, etc)
That’s definitely separation. Shaking it doesn’t get it all out of the bottle in my experience. This is why I don’t buy oil unless I’m going to use it within 3-6 months. I figure the oil blender put it in there for a good reason and now it isn’t in there.
My oils in black containers never have that problem for some reason. 
Or at least you can't see it.My oils in black containers never have that problem for some reason.
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- Mar 10, 2021
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Had that on both recent bottles of Pennzoil Platinum Euro 0w40 purchased through Walmart less than a year ago. No telling how long they sit in warehouses though.
Most oil jugs including Pennzoil have a date stamp.
I still have a few clear bottles of 14-year old QS Ultimate Durability in my stash with absolutely no sediment at the bottom. On the flipside, I routinely see sediment like this at the bottom of new Pennzoil jugs. So, not necessarily an age related phenomenon.
One thing I found that helps to get the sediment back in suspension is heat the oil and shake before use. Here in TX this is easily achieved by leaving the oil jug out in the sun for an hour before use and then shake vigorously.
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