Many vehicle owners make the mistake of mixing different oil grades. Despite the fact that it might seem like a minor problem, using the incorrect grade of oil can have a negative impact on the efficiency and durability of your engine. An in-depth discussion of the various oil grades, the potential repercussions of mixing them, and prevention tips are provided in this article.
Understanding Different Grades of Oil
There are different kinds of oil, and not all of them are equal. The ability of an oil to flow at various temperatures is gauged by its viscosity, which is standardized by the Society of Automotive Engineers (SAE). This determines the various oil grades, including SAE 10W-30 and SAE 20W-50.
Each grade of oil is uniquely formulated to satisfy the requirements of a specific kind of vehicle and driving circumstances. A car that is frequently driven in hot weather, for instance, would need a different grade of oil than one that is frequently driven in colder weather.
The Consequences of Mixing Different Grades of Oil
While it might seem like a good idea to mix higher-grade oil with lower-grade oil or vice versa, mixing different grades of oil can actually have negative effects on the longevity and performance of your engine.
The fact that mixing different oil grades can result in incorrect viscosity is the biggest problem. The ability of an oil to flow is determined by its viscosity, and using the wrong viscosity can result in inadequate lubrication, increased internal engine component wear and tear, and decreased fuel efficiency.
Mixing different grades of oil can result in chemical incompatibility in addition to incorrect viscosity. Different additives and chemicals are used in different grades of oil and are specially formulated to work together. These additives may react in ways that harm your engine if you combine them.
Avoiding the Mistake of Mixing Different Grades of Oil

Understanding the proper grade of oil for your vehicle and the driving conditions is crucial to avoid the error of mixing different grades of oil. The best place to start is by reading the owner’s manual for your car. This will give you the recommended oil type and viscosity from the manufacturer.
Utilizing a measuring device, such as a dipstick, to check the current oil level in your car will help you avoid mixing different oil grades. This will enable you to determine whether your engine already contains oil of a different grade and prevent the need to add more.
It’s also critical to keep in mind that various climates and seasons may call for various oil grades. For instance, you might need to use a heavier grade of oil in the winter to protect your engine from the colder temperatures while using a lighter grade of oil to keep your engine lubricated during the summer.
Outcome
In conclusion, using the right grade of oil is crucial for your engine’s performance and durability. Incorrect viscosity increased wear and tear on internal engine parts, and decreased fuel efficiency can result from mixing different oil grades. Understanding the proper grade of oil for your vehicle and the driving conditions is essential to avoid this error. To do this, you should refer to the owner’s manual, use a measuring tool, and keep in mind the various seasons and climates. Keep in mind that your vehicle’s performance and lifespan can be significantly affected by using the proper grade of oil.