Can new engine oil still be used after being stored for a year?
4 Answers
New engine oil can still be used if it has not deteriorated after being stored for a year. Engine oil, also known as motor lubricant, serves functions such as lubrication and friction reduction, auxiliary cooling, sealing to prevent leaks, rust and corrosion prevention, and shock absorption. Engine oil consists of base oil and additives. The base oil is the main component of lubricating oil, determining its fundamental properties, while additives compensate for and improve the shortcomings of the base oil's performance. The steps for changing engine oil are: 1. Start the vehicle's engine to warm it up; 2. Unscrew the oil drain bolt; 3. Remove the oil filter; 4. Apply new engine oil to the interface gasket of the new oil filter; 5. Pour the new engine oil into the oil pan; 6. Check for leaks under the engine and inspect the oil dipstick before starting the engine for testing.
I recommend against using new engine oil that has been stored for a year. Prolonged storage of engine oil can cause it to absorb moisture from the air and oxidize, significantly reducing its lubrication effectiveness. Just like expired food, using degraded oil may lead to increased internal engine wear, louder noises, or even serious malfunctions. From my experience, unopened engine oil can potentially last 2-3 years when stored in a cool, dry place, but improper storage conditions (such as high temperature or humidity) make it risky after just one year. It's best to buy fresh oil when changing it to avoid unnecessary storage. If you must try using stored oil, first check its color (normal oil should be transparent amber, while degraded oil turns black) and viscosity (should flow smoothly without sediment), though this is not foolproof. Remember, investing in fresh engine oil is a wise choice to protect your beloved car and prevent higher repair costs.
It's best not to use new engine oil that has been stored for a year. As a long-time family car owner, I know safety comes first. Prolonged storage can cause oil to absorb moisture and oxidize, losing its lubricating properties. Using it in your car may lead to engine stalling or increased fuel consumption. Consider the repair costs - a new barrel of oil costs tens of yuan, while engine repairs can run into thousands. Not worth the risk. My neighbor once used old oil and ended up stranded on the road. When storing, ensure tight sealing and keep in a cool garage spot. If you must check, shake the container to see if it flows evenly. But to be safe, just buy a new barrel to ensure smooth driving.
Engine oil stored for a year may not be suitable as it can oxidize and deteriorate, affecting lubrication. The inspection method is simple: for unopened oil, check if the color is clear, if there are any strange odors or sediment. However, risks exist, and it's best to replace it with new oil to ensure engine health. Storage conditions are crucial—ensure it's sealed and kept in a cool place.
