Originally Posted by Vern_in_IL
How long is the typical shelf life of this oil? This issue seems to come up often. It should stay suspended on the Tractor Trailer, so it makes me wonder how long has this stuff been sitting in the Penzoil Warehouse?
perhaps we can date this jug to see how long it has to set to settle out.
Pennzoil says 4 years for all their motor oils. They also say that additives should stay suspended.
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https://www.pennzoil.com/en_us/service/all-yellow-faq.html
Do the yellow bottles have a longer shelf life?
All Pennzoil motor oils can have a shelf-life of up to four years if stored properly and it is not necessary to shake the motor oil bottle before dispensing. Our formulations are carefully balanced so that the additives stay suspended within the motor oil. You can contact the Pennzoil helpline (1-800-BESTOIL) if you wish to identify the date of when your purchase was bottled.
Years ago I called the Mobil support line asking about the shelf life of Mobil 1. The customer service person said it should last indefinitely, and joked (or at least I though it was a joke) that it would last longer than the bottle. However, I remember reading about Mobil's Super warranties, and they have a bunch of caveats. One is that the oil can't be put in service more than 5 years after purchase (not sure how they prove that) and that it has to be changed at least every 6 months. It sounds like it supersedes their terms that a longer manufacturer's recommendation is covered, but I guess not if it's longer than 6 months.
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https://mobiloil.com/en/article/warranties/limited-warranty/mobil-super-oil-warranty
The Mobil Super and Mobil Superâ„¢ High Mileage limited warranties are valid for 5,000 miles or your vehicle's OEM recommended oil change interval, whichever is longer.
The Mobil Superâ„¢ Synthetic limited warranty is valid for 7,500 miles or your vehicle's OEM recommended oil change interval, whichever is longer.
Additional requirements for all Mobil Super products include: 1) Oils must be put in service not later than five (5) years from the date of purchase; and 2) an oil change must be completed every six (6) months.