10W-40 Quaker State oil from 80's. Any good still?

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  #1  
Old 05-30-06, 04:57 PM
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10W-40 Quaker State oil from 80's. Any good still?

Hello, I have a case of Quaker State 10W-40 motor oil that my Grandfather bought in the late 80's or early 90's. The case is in excellent condition & all the bottles are in it.

Does motor oil go bad? Should I use it?
 
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Old 05-30-06, 06:08 PM
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There was a discusion of motor oil shelf life here a while ago
The consesus and evidence of personal and professional studies presented seemed to indicate that motor oil in a sealed container is good for many, many, years

It's only when introduced into the engine where the acids form that lead to breakdown of the oils that oil goes bad
 
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Old 05-30-06, 06:51 PM
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Motor oils have changed thru the years. While the oil should be good for most motors from the 80's it may not have adequate protection for newwer vehichles. Be sure to check the letters on the bottle to make sure they have the correct grading for the vehichle you plan to use it in.
 
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Old 05-30-06, 07:14 PM
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It might take a while to use it all, but you could throw in one quart per oil change. If you use five quarts per change, that's 80 % latest tech oil and 20% old tech oil. Shouldn't hurt anything.
 
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Old 05-30-06, 08:56 PM
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Originally Posted by seasideheights
Hello, I have a case of Quaker State 10W-40 motor oil that my Grandfather bought in the late 80's or early 90's. The case is in excellent condition & all the bottles are in it.

Does motor oil go bad? Should I use it?

Use it for your lawn mower, chainsaw ( chain oil ) or for general lubricating purposes, I wouldn't use in my truck's engine, too much to lose
 
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Old 05-30-06, 09:14 PM
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Yeah.... use it in the mower. I wouldn't see no harm in using it in a old leaky car either.
 
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Old 09-05-06, 08:23 PM
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quaker state was bought about 4-5 yrs ago by PENNZOIL
 
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