DIY Oil Change: Subaru Impreza 2018 Edition

Nov 13, 2025 by Alex Braham 44 views

Hey there, fellow car enthusiasts! Let's dive into something crucial for keeping your ride running smoothly: an oil change for your Subaru Impreza 2018. This isn't just a routine chore; it's a vital part of preventative maintenance that can significantly extend the life of your engine and save you some serious cash in the long run. Plus, doing it yourself is a rewarding experience. This guide will walk you through the entire process, making it easy, even if you're a beginner. So, grab your tools, and let's get started!

Why Oil Changes Matter for Your 2018 Subaru Impreza

Oil changes are the lifeblood of your engine's health. Think of the engine oil as a cleaning agent and a lubricant. Over time, the oil breaks down, becoming less effective at its primary job. It picks up dirt, debris, and contaminants that can cause excessive wear and tear on your engine's components. Regular oil changes ensure your engine receives clean, high-quality oil, reducing friction, cooling the engine, and preventing premature wear. For your 2018 Subaru Impreza, following the manufacturer's recommended service intervals is crucial. Typically, you should change your oil every 6,000 to 7,500 miles, or every six months, but always refer to your owner's manual for the most accurate guidelines.

Ignoring your oil change schedule can lead to several problems. Dirty oil can clog oil passages, leading to a lack of lubrication and overheating. This can cause severe engine damage, requiring costly repairs or even a complete engine replacement. Additionally, poor lubrication can reduce fuel efficiency and overall engine performance. A well-maintained engine runs smoother, lasts longer, and delivers better gas mileage. Changing your oil is one of the most cost-effective ways to protect your investment and maintain the value of your Subaru Impreza. This proactive approach can help you avoid major headaches down the road. Consider this: the cost of an oil change is a tiny fraction of the potential expenses you could face from engine failure. By being diligent with oil changes, you’re not just maintaining your car; you're safeguarding your budget and your peace of mind.

The Benefits of DIY Oil Changes

Doing your own oil changes has several perks. Firstly, it saves you money. The cost of parts and supplies is considerably lower than the price you'd pay at a service shop. You're essentially paying for the oil, filter, and a few basic tools. Secondly, it gives you a deeper understanding of your car. You'll become more familiar with your engine and its components, which can be invaluable when diagnosing future problems. Thirdly, it's convenient. You can change your oil anytime, without having to make an appointment or work around a shop's schedule. Plus, it's a satisfying experience. There's a certain pride in knowing you've taken care of your car yourself. Finally, it allows you to choose the best oil and filter for your specific needs. You're not limited to the brands or types offered by a service center. You can research and select products that best suit your driving habits and the climate you live in. In essence, a DIY oil change is an investment in your car's longevity, your wallet, and your mechanical knowledge.

Tools and Materials You'll Need

Alright, before we get our hands dirty, let's gather the necessary tools and materials for the Subaru Impreza 2018 oil change. Having everything ready makes the process smooth and efficient.

New Oil: Check your owner's manual for the correct oil type and viscosity. Typically, the 2018 Subaru Impreza uses a 0W-20 synthetic oil. Make sure you buy enough, usually around 5 quarts, and buy a little extra.
Oil Filter: Purchase a new oil filter specifically designed for your 2018 Subaru Impreza.
Wrench for the Oil Drain Plug: You'll need the correct size wrench to remove the drain plug. This is usually a standard size, but it's always best to double-check your owner's manual.
Oil Filter Wrench: This tool is designed to remove and install the oil filter. There are several types available, so choose one that fits your filter.
Drain Pan: A container to catch the old oil. Make sure it's large enough to hold all of the oil.
Ramps or Jack and Jack Stands: You'll need to lift the front of your car to access the oil drain plug and filter. Ramps are convenient if you have them. If you're using a jack, ensure you have jack stands for safety. Never work under a car supported only by a jack.
Gloves: To keep your hands clean.
Funnel: To help pour the new oil into the engine.
Rags or Paper Towels: For cleanup.
Wheel Chocks: For safety, to prevent the car from rolling.

Where to Buy Your Supplies

You can find all of these supplies at your local auto parts store, such as AutoZone, Advance Auto Parts, or NAPA. You can also order them online from retailers like Amazon or eBay. When buying, make sure to get the correct parts for your 2018 Subaru Impreza to avoid any compatibility issues. Don’t hesitate to ask for assistance at the auto parts store; the staff is usually knowledgeable and can help you select the right products. Consider buying your oil and filter in a kit to save time and possibly money. These kits often include everything you need in one convenient package. Comparing prices between different stores is a good practice to ensure you're getting the best deal. Also, check for sales and promotions; you might be able to find great discounts on oil, filters, and other supplies. Before you start, double-check that you have everything you need. This will save you from making a last-minute run to the store midway through the oil change.

Step-by-Step Guide to Changing Your Oil

Okay, let's get down to the actual oil change for your Subaru Impreza 2018. Follow these steps carefully, and you'll be done in no time.

Prepare the Vehicle: Park your car on a level surface and engage the parking brake. Use wheel chocks to secure the rear wheels. If the engine is warm, let it cool down for about 10-15 minutes.
Raise the Vehicle: If using ramps, drive the front of the car onto the ramps. If using a jack, position the jack under the front of the car, and lift it. Place jack stands under the frame for safety, and then lower the car onto the jack stands.
Locate the Oil Drain Plug: Crawl under the front of the car and locate the oil drain plug on the oil pan.
Position the Drain Pan: Place the drain pan under the drain plug to catch the old oil.
Remove the Drain Plug: Using the correct size wrench, carefully unscrew the drain plug. Be prepared for the oil to flow out.
Let the Oil Drain: Allow the oil to drain completely. This can take about 15-20 minutes. While the oil is draining, you can move on to the next step.
Locate the Oil Filter: The oil filter is typically located on the side or bottom of the engine. Consult your owner's manual if you're unsure.
Remove the Oil Filter: Use the oil filter wrench to loosen and remove the old oil filter. Be prepared for some oil to spill.
Prepare the New Oil Filter: Lightly lubricate the rubber gasket on the new oil filter with fresh oil.
Install the New Oil Filter: Screw the new oil filter onto the engine by hand until the gasket makes contact, then tighten it according to the instructions on the filter (usually about ¾ to 1 full turn).
Reinstall the Drain Plug: Once the oil has finished draining, clean the drain plug and install a new crush washer if needed. Screw the drain plug back into the oil pan and tighten it to the manufacturer's specifications.
Lower the Vehicle: Remove the jack stands (if used) and lower the car.
Add New Oil: Open the hood and remove the oil fill cap. Insert the funnel and pour in the correct amount of new oil as specified in your owner's manual (usually around 4.8 quarts for a 2018 Subaru Impreza).
Check the Oil Level: Use the dipstick to check the oil level. Add more oil if needed to reach the “Full” mark.
Start the Engine: Start the engine and let it run for a few minutes. Check for any leaks around the drain plug and oil filter.
Check the Oil Level Again: After the engine has run for a few minutes, turn it off and check the oil level again. Top off if necessary.
Reset the Maintenance Reminder: If your car has a maintenance reminder, reset it according to the instructions in your owner's manual.
Dispose of the Old Oil and Filter: Properly dispose of the used oil and filter at a recycling center or auto parts store.

Important Safety Tips

Safety is paramount when doing an oil change. Here are some essential safety tips. Always work in a well-ventilated area to avoid inhaling harmful fumes. Wear safety glasses to protect your eyes from oil splashes. Use jack stands whenever you lift your car to prevent it from falling. Never work under a car supported only by a jack. Be careful when handling hot oil and engine components. Let the engine cool down before starting. If you’re unsure about any step, consult your owner's manual or seek professional assistance. Keep your work area clean and organized to avoid tripping hazards. If you spill any oil, clean it up immediately to prevent slips and falls. Following these safety tips will help ensure a smooth and safe oil change experience.

Troubleshooting Common Issues

Sometimes, things don’t go perfectly, even with the best planning. Here are some solutions to potential issues you might encounter during your Subaru Impreza 2018 oil change.

Difficulty Removing the Drain Plug: If the drain plug is stuck, try using a breaker bar or penetrating oil to help loosen it. Avoid excessive force, which could strip the threads.
Difficulty Removing the Oil Filter: An oil filter wrench is essential here. Make sure the wrench fits properly and provides enough grip. If the filter is still stubborn, try tapping it gently with a hammer.
Leaking Drain Plug: If the drain plug leaks, make sure the crush washer is properly installed and that the plug is tightened to the correct torque specification.
Leaking Oil Filter: Ensure the oil filter gasket is properly lubricated and that the filter is tightened securely. Double-check that the filter is the correct type for your car.
Overfilling the Oil: If you accidentally overfill the engine with oil, use a suction tool or drain some oil from the drain plug to bring the level down to the correct mark on the dipstick.
Engine Won't Start After Oil Change: Double-check that the oil level is correct and that all connections are secure. Make sure you haven't disconnected any wires accidentally. If the engine still won't start, there might be another underlying issue unrelated to the oil change.

Final Thoughts and Next Steps

Congratulations, you've successfully completed an oil change on your 2018 Subaru Impreza! That wasn't so bad, right? By following these steps, you've not only saved money but also gained valuable knowledge about your car. Remember to keep track of your oil change intervals and any other maintenance tasks you perform. Keep your owner's manual handy for quick references. You can also explore other DIY car maintenance tasks to expand your skills. Consider changing other fluids, such as coolant and brake fluid, or replacing your air filter. Taking care of your car yourself is a rewarding experience. It not only saves you money but also gives you a sense of accomplishment. It's a great way to stay connected with your vehicle and ensure it runs smoothly for years to come. Enjoy the open road, and happy wrenching! Don’t forget to properly dispose of your used oil and filter at a recycling center or auto parts store. Keeping your car well-maintained will not only save you money but also improve its performance and longevity.