The Thick Oil Myth: Why Running Heavy Motor Oil in Winter Starves Modern Engines (And the High-Mileage Truth)
Think running thicker motor oil in winter gives your engine 'extra protection'? That old-school advice is destroying modern variable valve timing (VVT) systems and timing chains. Here is why engine clearances dictate your viscosity, what happens if you deviate, and the surprising truth about high-mileage oil.