Let’s explain all of those confusing numbers, letters and terms to help you choose the right oil for your car.

Engine oil needs to form a protective film ... [VIDEO] Why an Oil's Viscosity Index is Important Measuring fuel efficiency gains in off-road fleets is difficult. “While most long-haul trucks ...

For that reason, it is critical to understand the importance of oil viscosity in diesel engines, as it plays a major role in engine health. Read more: 11 Best Motor Oil Brands In 2024, Ranked The ...