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When Hollywood Ruled The Skies - Volumes 1 through 4 by Bruce Oriss


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 Post subject: Stale-Dated oil?
PostPosted: Tue Apr 21, 2009 7:26 pm 
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Location: Edmonton, Alberta
I am able to get my hands on some inexpensive 100 mineral oil for my Harvard (which it currently uses) and some 25/60 for my brother's Yak, however, the oil is about 10 years old. The reduced price is because he wants to unload this "old" oil. Does oil have a shelf-life?

Drew


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PostPosted: Tue Apr 21, 2009 10:36 pm 
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PostPosted: Wed Apr 22, 2009 6:36 am 
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Generally the expiration date can be extended by double if you have the oil tested to ensure that it still meets the original mil spec.

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PostPosted: Wed Apr 29, 2009 5:46 pm 
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In 1990 I was involved in locating and removing underground storage tanks a a major airline's maintenance base. We found a large underground tank, nearly full of 60 weight recip engine oil. The oil had been in the tank since the airline converted from DC-7's to 707's in the early 1960's.

We sent a sample to our engineering laboratory where it was found to still meet specifications. We donated it to a local A&P school where it was used without any problems.


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