Safe to use sitting oil? - Drive Accord Honda Forums
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post #1 of 16 Old 04-04-2019, 01:41 PM Thread Starter
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Safe to use sitting oil?

Hi everyone,

I purchased some 0w20 synthetic oil in the fall when it went on sale. Now it's been sitting in the trunk of my car in the (not heated) garage all winter, so I'm curious, would it still be okay to use, or did I simply throw money away?

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post #2 of 16 Old 04-04-2019, 01:49 PM
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Hi everyone,

I purchased some 0w20 synthetic oil in the fall when it went on sale. Now it's been sitting in the trunk of my car in the (not heated) garage all winter, so I'm curious, would it still be okay to use, or did I simply throw money away?
I would probably throw it away if I were you and get some quality used oil from a dealership, oil change shop, etc. they usually sell it cheaper than new and you know for a fact it has to be good or it wouldn’t have already been used. New oil that has been sitting around is probably the worse thing for your engine.

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post #3 of 16 Old 04-04-2019, 01:58 PM
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It's good, no worries.
think of it this way:
It routinely sits on the shelf at the parts store...in the same condition(sealed) and, it's made to withstand hot and cold temps...that's its job...without any loss of viscosity.

It's perfectly fine.

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post #4 of 16 Old 04-04-2019, 02:01 PM
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It's fine.

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post #5 of 16 Old 04-04-2019, 02:01 PM
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Totally fine. It’s oil, not milk.
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post #6 of 16 Old 04-04-2019, 02:10 PM
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Sitting for a few months? No worries.

Now if it was sitting under the sun in a dark colored container in Arizona all summer, that would have made me think, but winter cold? Absolutely no worries at all. Motor oil does not freeze; it is designed to not to do that. Not at temperatures naturally encountered on this planet.

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post #7 of 16 Old 04-04-2019, 02:43 PM
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@emeron : even then, nothing compared to the heat, friction and chemical environment of a running engine.

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post #8 of 16 Old 04-04-2019, 02:53 PM
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@emeron : even then, nothing compared to the heat, friction and chemical environment of a running engine.
Agreed. Motor oil degrades quicker in higher temps. That's why mileage is not a fully relevant measure to determine oil life. Hours, temperature and RPM are some of the factors that come to mind.

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post #9 of 16 Old 04-04-2019, 07:16 PM
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Use it.

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post #10 of 16 Old 04-04-2019, 07:29 PM
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It's fine.

However, this does make my wonder. If the oil sit long enough (for years), won't the plastic bottle that it sits in degrade and leave the oil less than desirable? Or I suppose which will expire first? The oil or the bottle?

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post #11 of 16 Old 04-05-2019, 04:37 AM
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I doubt the plastic would decay except in the case of being in direct sunlight.

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post #12 of 16 Old 04-05-2019, 05:17 AM
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Shake it just prior to pouring it in. Some additives could have settled to the bottom of the container(s). Good to go.
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post #13 of 16 Old 04-09-2019, 11:59 AM Thread Starter
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Thanks for the responses everyone.

So I changed the oil yesterday after work with the oil and filter I had sitting around. Once I had it all changed I looked in the jug and saw a bunch of translucent flakes floating near the bottom in the last half liter I didn't use, pictured below.

In case anyone is wondering, it's pennzoil ultra platinum 0w20

So now I'm curious as to how much of this is floating around in my engine. At this point I'm debating changing it again.
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post #14 of 16 Old 04-09-2019, 12:03 PM
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That’s why you have a filter.

In all fairness, that oil has been sitting around far longer on truck trailers, shipping containers, delivery trucks and in boxes at the store than in your trunk. Check it again in 6,000 miles when you change it...

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post #15 of 16 Old 04-15-2019, 01:30 PM
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Quote:
Originally Posted by Blank Point View Post
Thanks for the responses everyone.

So I changed the oil yesterday after work with the oil and filter I had sitting around. Once I had it all changed I looked in the jug and saw a bunch of translucent flakes floating near the bottom in the last half liter I didn't use, pictured below.

In case anyone is wondering, it's pennzoil ultra platinum 0w20

So now I'm curious as to how much of this is floating around in my engine. At this point I'm debating changing it again.
Did you even see the post above yours, telling you to shake it up a bit??

Oil has additives in it.
When you only use a little bit of oil that's been sitting around, the additives settle to the bottom. Normally you're dumping oil in upside down which empties everything into the engine, additives et al.
Again, you'll be fine. I would not worry about it.
The other 4 quarts will have enough in them.


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