Choosing the right engine oil isn’t just about brand—it’s about what your engine needs. Factors like your vehicle’s age, driving style, climate, and manufacturer recommendations all play a role. In this guide, we break down the differences between viscosity grades (like 5W-30 vs. 10W-40), explain how to read oil labels, and help you understand which formulation—fully synthetic, semi-synthetic, or mineral—is the best match for your car. Whether you’re a daily driver or a weekend warrior, make your next oil change the right one.