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Old 02-15-2002, 01:21 AM
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Oil "Shelf Life" ???

Does motor oil have a shelf life? This is regarding factory-sealed quart containers. My dad's got some oil in his shop that's about 2-years old.

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Old 02-15-2002, 03:37 AM
Car Killer
Join Date: Jan 2002
Location: Northern VA
Posts: 178
Mobil gives properly sealed aviation oil a shelf life of 15 years. This is important in the industry, as lives could (and do) depend on it. So if mobil will put their name on a 15 year shelf life for an oil keeping a turbine spinning, i'll bet money it'll last 30 years.

Mobil Jet Oil 254 may be stored for 15 years

BTW, it spent a million years underground. 2 years in a bottle is nothing.
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Old 02-18-2002, 04:50 AM
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Good point

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Old 02-18-2002, 04:18 PM
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Join Date: Apr 2001
Location: Dallas/Fort-Worth
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That's 2 million years as unrefined crude...

...what about all of those additives and such in refined oil? The oil may not break down, but how long does the chemical bonding of the ancillary compounds stay intact?
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Old 02-18-2002, 09:45 PM
Fimum Fit
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Beware of old synthetics

There was a time when the synthetic oil industry was young (and I was merely middle-aged) when they had not perfected the techniques for keeping some of their additives in suspension on the shelf, especially the metallic EP additives which protect cams and lifters, etc. If you come upon some very old synthetic stuff, be sure to really shake well (the can, not yourself) before using, or you'll be leaving some important chemicals in those few drops in the bottom of the bottle.
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Old 02-19-2002, 03:54 AM
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At the frequency that I change motor oil in my car (3500 miles), I am not unduly worried if an 'old' stock was used. Cant do much damage over a 3500 mile interval I reckon.

Is there an expiry date on a bottle of engine oil?
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