Typically, motor oils stay stable and have a shelf life of up to five years. However, this stability can depend on a number of factors and it is always advisable to follow the manufacturer’s storage instructions.
How long can engine oil sit in a car?
Don’t depend on oil that’s been sitting for longer than six months. It’s the moisture and other changes in the oil that could damage the engine after that point.
How Long Will synthetic oil last in a stored car?
When properly stored, some synthetic oils can last up to 5 years. You should store your oil in a cool and dry place.
Does oil go bad?
Over time oils do spoil – they go rancid. … Oils go rancid through a chemical reaction that causes the fat molecules in the oil to break down. The whole process is sped up by exposure to air, light and heat.
Can synthetic oil last a year?
Synthetic Oil Change Interval
Most synthetic oils are rated to last between 10,000 to 15,000 miles, or six months to a year. Manufacturer recommended ratings are typically applied to “normal driving,” and don’t reflect severe driving conditions that may require more frequent oil changes.
How can you tell if oil is rancid?
Another easy way to tell if there may be rancidity: If your bottle of oil feels sticky. That’s oil residue undergoing polymerization, says LaBorde—an advanced stage of the rancidity process. If your oil looks darker than usual, that’s another sign. “When in doubt, throw it out.