Well - call me an idiot but I put several quarts of 10 year old Castrol
20-50, which was improperly stored, in my Mk IX. I figured if there was any
mold or bacteria in there the heat would kill it and the filter would get
it. so far no probs with the Mk IX... but the oil definitely runs a little
dirty. I had to stir it up, and the oil was cloudy after stirring, rather
than clear as before... but it works just fine. I have the same problem
here in HK, I can't get oil with the good stuff in it here. I now just buy
the ZDDP additive and use whatever I can get here.
I suspect the synthetic oil will probably keep longer, as it is likely
sterile.
On Sun, Jun 27, 2010 at 7:17 AM, Bob Spidell <bspidell@comcast.net> wrote:
> It occurred to me to use The Google on this ...
>
> According to several articles I read, if properly stored--between 45-80degF
> and dry--the recommended maximum shelf life is 5 yrs. (that's a
> manufacturers' recommendation, so you can probably get away with longer).
> Like Kees mentioned, some additives can settle out so it's a good idea to
> shake the bottle if it's been sitting too long.
>
> I asked because I stocked up on 20W-50 before they took all the good stuff
> out.
>
>
> bs
>
>
>
> Oudesluys wrote:
>
>> Unless the can has been opened I do not think there is any problem.
>> However, if the can once has been opened air will come in and react with the
>> oil in the (very) long run. I have used engine oil of well over 10 years old
>> in the Landrover without ill effects.
>> It will need a good shake as some mixed in substances do sink to the
>> bottom of the can.
>> Kees Oudesluijs
>> NL
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