The lifespan of a sealed oil bottle can be two to five years, depending on the producer. This depends on the temperature and how the oil is stored. Whether inside the engine or in a bottle on a shelf, over time the oil degrades and no longer protects the parts against wear and tear. My wife's car just showed a maintenance warning that must be done within 30 days, or in other words, it's been 11 months since the last oil change she and I did.
Low viscosity oil allows the engine to rotate more easily, operate at a lower temperature and dissolve deposits left by contaminated and oxidized conventional oils. The addition of state-of-the-art artificial additives (antioxidants, corrosion and foaming inhibitors, anti-wear agents, detergents and water dispersers) produces an oil that offers engine protection far superior to that of conventional engine oil. With COVID and working from home, I checked my mileage at my last oil change (34.26) and my ODO is currently at 36,750, meaning that I have traveled just under 2500 miles since last March, when I last got in the car.
