what type of oil to use in my car

Popping the hood to check your oil is a simple act of car care, but the choices on the auto parts store shelf can feel overwhelming. With so many bottles, weights, and labels, it’s easy to wonder exactly what type of oil to use in my car. Using the right oil is one of the most important things you can do to keep your engine running smoothly for years to come.

Your Car’s Manual Has the Answer

The single best source of information is your vehicle’s owner’s manual. The engineers who built your car spent thousands of hours testing to determine the perfect lubricant. Open the manual to the maintenance or specifications section, and you’ll find the recommended oil viscosity (like 5W-30) and performance standard (like API SP). This is your car’s perfect recipe, so following it is always your safest bet.

Decoding the Numbers on the Bottle

That “5W-30” isn’t just a random code. The number before the “W” (which stands for Winter) tells you how the oil flows in cold weather—a lower number means it stays thinner for easier cold starts. The number after the “W” indicates how thick the oil remains at your engine’s normal high operating temperature. Using the wrong viscosity can lead to poor lubrication or reduced fuel efficiency.

Conventional vs. Synthetic: Making the Choice

You’ll primarily choose between conventional and synthetic oil. Conventional oil is a refined petroleum product, while synthetic oil is engineered in a lab for superior performance. Synthetic oils generally offer better protection against extreme temperatures, reduce engine sludge, and can last longer between changes. Many modern cars require synthetic blends or full synthetics, so check your manual. If your car is older and has always used conventional, it’s usually fine to stick with it, but switching to synthetic can provide extra protection.

Final Tips for Your Next Oil Change

When you’re ready for an oil change, your best course of action is clear. Grab your owner’s manual, note the recommended viscosity and performance standard, and choose between conventional or synthetic based on your car’s needs and your driving habits. Don’t forget to replace the oil filter every time for complete protection.

Taking a few minutes to find the right oil pays off with a happier, healthier engine. It’s a small step that makes a big difference in the long-term life of your vehicle.