- as far as im aware shelf life on sealed motor oil is twice that of non-synthetic, the point of synthetics is that they dont break-down, even if the container was not sealed it should still be fine, condensation would be an issue with numerous heating and cooling cycles such as in an engine not stored in a garage...the oil container will deform a bit to compensate for cooling and heating contraction and expansion, its not sucking in any air so no moisture can get in, mineral oil is stable to 425 degrees F, synthetic to over 500 F...the only issue is the SAE rating, they keep improving the additive packages all the time
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mobiloil marketing want you, of course, to buy-buy-buy
- from motul...Motul is ISO 9001 certified and according to our quality procedure, Motul products are guaranteed for 2 years after the production date. To be sure, we keep one sample of each produced batch and check it from time to time during 2 years. After 2 years we have no experience therefore we cannot guarantee our products.
- from castrol..."Unfortunately, the shelf life of Castrol Syntec 5w-50 is 5 years, so we would not recommend using the product."
Thank you for contacting Castrol, The Technology Leader!
Andrea Roche
Castrol Consumer Relations
1-800-462-0835
Castrol@Idea-Factor.com
