What Do You Do With Oil After An Oil Change

The humble oil change. It's a cornerstone of vehicle maintenance, vital for keeping your engine running smoothly and extending its lifespan. But what happens to that black, viscous liquid after it's drained from your engine's crankcase? Disposing of used oil responsibly is crucial, both for the environment and, in some cases, for adhering to local regulations. This article delves into the proper methods for handling used motor oil after an oil change, catering to car enthusiasts, DIY mechanics, and professionals alike.

Understanding the Problem: Why Can't You Just Dump It?

Used motor oil is far more than just "dirty oil." It's a complex cocktail of partially combusted fuel, metallic particles from engine wear (like iron and aluminum), and various chemical additives that have broken down during use. Disposing of it improperly – such as dumping it down a drain, into the ground, or in the trash – poses significant environmental risks. Even small quantities of used oil can contaminate groundwater, pollute soil, and harm aquatic ecosystems. The Environmental Protection Agency (EPA) has stringent regulations regarding the disposal of hazardous waste, and used motor oil often falls under this category.

The Right Way: Collection and Recycling

The preferred method for dealing with used oil is recycling. Fortunately, a robust infrastructure exists to facilitate this process. Here's a breakdown of the common routes for responsible disposal:

Designated Collection Centers: Most auto parts stores (like AutoZone, O'Reilly Auto Parts, and Advance Auto Parts) and service stations serve as collection centers for used motor oil. They typically have designated tanks or containers where you can deposit your used oil free of charge. Some retailers may have a limit on the amount they accept per visit. Always call ahead to confirm their policies.
Local Recycling Programs: Many municipalities offer household hazardous waste (HHW) collection programs that include used motor oil. These programs may involve scheduled collection days or permanent drop-off locations. Check your local government's website for details.
Certified Recycling Facilities: These facilities specialize in processing used oil. They clean and re-refine the oil, removing contaminants and restoring it to a usable state. This recycled oil can then be used in various applications, including lubricating oil, hydraulic fluid, and even fuel oil.

Preparing the Oil for Collection

Before you can drop off your used oil, proper preparation is key:

Use a Suitable Container: Store the used oil in a clean, leak-proof container. The original oil bottle is often a good choice if it's in good condition. Avoid using food or beverage containers, as this can lead to confusion and accidental ingestion. Clearly label the container as "Used Motor Oil."
Prevent Contamination: Don't mix used oil with other fluids, such as antifreeze, brake fluid, or solvents. Contamination can complicate the recycling process and may even render the oil unusable.
Keep It Cool and Dry: Store the container in a cool, dry place away from direct sunlight and extreme temperatures.
Don't Overfill: Leave some space at the top of the container to allow for expansion, especially in warmer weather.

What Happens to Recycled Oil?

The re-refining process involves several steps to remove contaminants and restore the oil's original properties. These steps typically include:

Dehydration: Removing water from the used oil.
Distillation: Separating the oil into different fractions based on boiling points.
Hydrotreating: Using hydrogen to remove impurities and improve the oil's color and stability.
Additization: Adding new additives to restore the oil's performance characteristics.

The end result is a high-quality base oil that can be used to manufacture new lubricating oils, hydraulic fluids, and other petroleum products. Using recycled oil helps conserve natural resources, reduces energy consumption, and minimizes pollution.

Beyond the Oil: What About the Filter?

Don't forget about the oil filter! Used oil filters also contain residual oil and metal contaminants. Many auto parts stores and recycling centers also accept used oil filters for recycling. They are typically crushed and the metal is recycled. Check with your local recycling center for specific instructions. When transporting oil filters, it’s a good idea to drain them as much as possible and place them in a sealed plastic bag to prevent drips.

Professional Garages and Shops

For professional garages and workshops, used oil management is even more critical. These businesses are subject to more stringent regulations and often use specialized equipment for collecting, storing, and transporting used oil. They typically contract with licensed waste disposal companies to handle the recycling process. Proper training for employees is essential to ensure compliance and prevent spills or leaks.

Conclusion

Responsible disposal of used motor oil is a shared responsibility. By following the guidelines outlined in this article, you can help protect the environment and contribute to a more sustainable future for the automotive industry. Remember, even small actions can make a big difference. The next time you perform an oil change, take the extra step to ensure that your used oil is handled properly. It's a simple task with significant benefits for our planet and our communities.