What is the shelf life of Shell engine oil after opening?

[LillianaMarie]

In terms of shelf life, Shell engine oil is the same as other ordinary engine oils. When unopened, its shelf life is approximately 5-6 years. Increased fuel consumption: When adding engine oil, the oil level should be between the upper and lower limits on the dipstick. If too much oil is added, the engine temperature will rise, causing the oil volume to expand. This increases pressure in the oil chamber and operating resistance, leading to reduced vehicle power and increased fuel consumption. Overfilling engine oil: Excessive engine oil can cause oil to leak through the crankcase vent pipe. Increased pressure in the crankcase can loosen the oil seal due to oil pressure, resulting in oil leakage. Heat dissipation: Overfilling engine oil can affect engine heat dissipation.