How Long Can Motor Oil Be Stored in a Car Exposed to Sunlight?

[VonZoe]

Motor oil should not be exposed to sunlight. Once opened, it can be stored for about a year. To prevent opened motor oil from deteriorating, proper storage is necessary. Here are some relevant guidelines: 1. Dry Environment: The storage environment for motor oil bottles must be clean and dry, ensuring no exposure to sunlight to prevent oxidation of the oil inside the bottle. 2. Immediate Sealing: After opening, the motor oil must be sealed immediately. After completing car maintenance, apply a clean plastic film over the bottle opening and tighten the cap. 3. Avoid Adding Small Residues: When adding leftover motor oil from previous maintenance, do not pour all of it into the engine. Retain a small portion. Generally, after long-term storage, a minimal amount of moisture may accumulate at the bottom of the oil bottle, which could adversely affect engine performance if added.