Does oil have shelf life

[dave1251]

Not better just made with a different base stock. EOP was in development by Pennzoil when Shell purchased the Pennzoil/Quaker State company. But Shell decided that with Shell's group III base stocks performance could be met with a lower cost than using EOP or that is the theory.

 

[BrianWC]

I just used up my last SJ oils about a year ago. Can't wait to work through the SL and see what the hubub is about this new SM stuff!

 

[Capa]

Originally Posted By: skyship
If you read the oil company sites, you will find the shelf life of engine oil varies according to the type of oil. Fully synthetic oil lasts longer than conventional oil and Mobil 1 quote 5 years in comparison to 3 for Castrol GTX. Oddly enough it does not matter if the bottle is opened, but the storage conditions do matter and keeping the oil in a cool place that does not vary much in temperature terms helps.
If you do want to use old oil always pour it into a clear glass container and check for sediment and signs of cloudiness as the additives can settle out or if the cap was not a good seal the oil may have absorbed moisture.


+2 oil definitely has a shelf life and it can be prolonged if stored properly (mine is stored in the pantry).