quote:No, that's bull. This stuff was taken out of the ground where it was naturally synthesized from animal and vegetable matter and "stored" as a toxic witch's brew at he11ish pressures and temperatures for millions of years, refined, and loaded with preservative and performance enhancement chemicals to extend its useful life in service - and we're supposed to believe it magically craps out in a year and a half when stored in a sealed container at normal tempratures? Yeah, right. The Material Safety Data Sheets for all brands indicate an indefinite shelf life when stored at temperatures tolerable to humans in its original sealed container. This is motor oil - not fresh meat or produce.* The only valid argument I see for avoiding oil more than three years old is that the API "Sx" classification changes more or less at that interval. Even then, for cars that were originally designed to run at an older "Sx" classification, using new-old-stock sealed motor oil of that classification would be perfectly appropriate. *As an aside, yak butter's been dug up from storage in burried clay pots several times over the past 75 years at archeological digs in Mongolia. Purportedly, it was still edible when analyzed. Carbon dating has determined this stuff to be between 1,000 and 1,500 years old. The average ground temperature at the roughly 5' depth was between 45 and 60 degrees Fahrenheit. Personally, I'll stick with, "I Can't Believe It's Not Butter", though. Yack butter?! [ November 29, 2003, 12:22 PM: Message edited by: Ray H ]
Originally posted by Jason8691: Does motor oil really only have an 18 month shelf life???