If your vehicle has more than 75,000 miles on the odometer, you've probably noticed that engines start behaving differently. Oil consumption increases, you might spot stains on your driveway, and overall engine performance can suffer. This is when switching to a high mileage motor oil becomes worth considering. Understanding what these oils do and how to pick the right one can help you keep your aging engine running smoothly for years to come.

What High Mileage Motor Oil Actually Does

High mileage motor oils are formulated differently from standard oils because they address specific problems that develop as engines age. The main issues they tackle include increased oil consumption, small leaks around seals, wear on engine components, and the buildup of deposits and sludge.

Valvoline Full Synthetic High Mileage with MaxLife Technology is designed with seal conditioners that help treat and prevent oil leaks in older engines. The formula also includes enhanced detergents and additives to protect against wear, heat damage, and reduced horsepower. Because it's a full synthetic oil, it provides better protection and lasts longer than conventional oils.

Understanding the 5W-20 Specification

The numbers on a motor oil bottle can look confusing, but they're actually telling you important information about whether the oil will work in your vehicle. The 5W-20 rating found on Valvoline Full Synthetic High Mileage refers to the oil's viscosity, which is essentially how thick or thin it is.

The first number, 5, tells you how the oil flows in cold temperatures. Lower numbers flow better when it's cold, which matters for winter driving and engine startup. The second number, 20, describes the oil's thickness at operating temperature. You cannot simply choose a viscosity you like; you must use the grade specified in your vehicle's owner manual. Check your manual or look inside your fuel door or engine bay for a sticker that tells you exactly which weight your car needs. Using the wrong viscosity can damage your engine or void your warranty.

When to Make the Switch to High Mileage Oil

You don't automatically need high mileage oil the moment your car reaches 75,000 miles. The right time to switch depends on how your engine is behaving. If you notice oil spots under your vehicle, your oil level dropping faster than usual between changes, or if your vehicle's manufacturer recommends it, then high mileage oil makes sense.

Some people switch at 75,000 miles as a preventative measure, while others wait until they see actual signs of wear. Either approach can work, but paying attention to your engine's behavior helps you make the right choice. High mileage formulas won't hurt a newer engine, but they're specifically engineered to address the problems older engines face.

Checking Compatibility and Meeting Standards

Before buying motor oil, verify that it meets your vehicle's requirements. Valvoline Full Synthetic High Mileage meets or exceeds API SP and ILSAC GF-6A standards, which means it's approved for modern engines and provides the protection newer vehicles need. This matters because engine technology has evolved, and oils must be formulated to work with current engine designs.

Always confirm your vehicle's manual specifies that 5W-20 is the correct viscosity for your model, year, and engine type. If you're uncertain, check with your vehicle manufacturer or a trusted mechanic before making a change.

Maintenance and Oil Change Intervals

Full synthetic oils like Valvoline Full Synthetic High Mileage typically last longer than conventional oils between changes, though your specific oil change interval depends on your vehicle and driving habits. Check your owner's manual for the recommended interval. Some vehicles with full synthetic oil can go longer between changes, while others maintain regular intervals. Don't skip oil changes based on assumptions; follow what your manual recommends.

The case of three 5-quart bottles of Valvoline Full Synthetic High Mileage with MaxLife Technology 5W-20 is convenient for people who do their own oil changes or those who want to have backup supply on hand. Just remember that the 5W-20 rating is specific, so verify it matches your vehicle's requirements before opening a bottle.

The product in this guide: Valvoline Full Synthetic High Mileage with MaxLife Technology SAE 5W-20 Motor Oil 5 QT, Case of 3