Two answers - choose the one you like best
>From the Valvoline website FAQ page:
Q. Does motor oil expire? How long does motor oil generally last?
A. Valvoline motor oil does not have a documented expiration date. Under
optimal conditions, the product is stable for an extended period of time and
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 owner's
manual. If the rating is still current, shake the container before use to blend
any additives that may have settled.
Mobile Oil:
http://www.mobilindustrial.com/ind/english/files/tt-lubricating-oils-greases-shelf-life-recommendations.pdf
Al
> On Apr 8, 2015, at 10:55 PM, Bob Spidell <bspidell@comcast.net> wrote:
>
> Yup, time to stir the pot AGAIN. Not really, just wonderin ...
>
> I buy oil in bulk--i.e. a case or so at a time--and so it's liable to sit for
> a while before I install it. I've noticed a tiny bit of sediment in oil
> that's sat for a long time; just wondering if I should
>
> a) agitate the container to disperse the sediments, or
> b) leave it be, essentially decant the container
>
> The sediment doesn't seem solid, more like 'chalky' oil.
>
> Thoughts?
>
> Bob
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