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 for an Oil Change near North Charleston SC 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.
