2018 Subaru Impreza Oil Change: A Simple Guide

Nov 18, 2025 by Alex Braham 47 views

Hey guys! Changing your oil is one of the most important things you can do to keep your 2018 Subaru Impreza running smoothly. It's like giving your car a refreshing drink of life! If you're looking to tackle this maintenance task yourself, you've come to the right place. This guide will walk you through each step, making the process easy and straightforward. We'll cover everything from gathering the necessary tools and materials to properly disposing of the used oil. So, grab your wrenches, and let's get started on this essential service for your Impreza!

Why is an Oil Change Important?

Okay, so why all the fuss about oil changes? Well, engine oil is the lifeblood of your car. It lubricates all the moving parts in your engine, preventing them from grinding against each other and causing wear and tear. Think of it like this: without oil, your engine would be like a group of dancers trying to perform on a dry, sticky floor – not a pretty sight! Over time, engine oil breaks down and becomes contaminated with dirt, debris, and combustion byproducts. This dirty oil loses its ability to properly lubricate and protect your engine, which can lead to reduced performance, decreased fuel efficiency, and even serious engine damage. Regular oil changes remove this old, dirty oil and replace it with fresh, clean oil, ensuring that your engine stays properly lubricated and protected. This, in turn, extends the life of your engine and keeps your Impreza running smoothly for years to come. Ignoring oil changes is like neglecting your health – it might not cause immediate problems, but it will catch up with you eventually. So, prioritize those oil changes, and your Impreza will thank you for it!

Maintaining optimal engine performance and extending its lifespan relies heavily on regular oil changes. Fresh, clean oil ensures all engine components are adequately lubricated, reducing friction and preventing premature wear. As oil ages, it accumulates contaminants such as dirt, metal particles, and combustion byproducts, diminishing its lubricating properties. This degradation can lead to increased engine heat, reduced fuel efficiency, and potential engine damage. Consistent oil changes, therefore, are not just a routine task but a critical aspect of preventative maintenance. By adhering to the recommended oil change intervals specified in your 2018 Subaru Impreza's owner's manual, you can safeguard your engine against costly repairs and ensure it operates at its peak performance. Think of oil changes as an investment in your vehicle's longevity and reliability, providing peace of mind and a smoother driving experience. Furthermore, regular oil changes contribute to environmental sustainability by ensuring your engine runs efficiently and produces fewer emissions. So, prioritizing oil changes is not only beneficial for your vehicle but also for the environment.

Choosing the right oil is crucial for maintaining the health and performance of your 2018 Subaru Impreza. Subaru recommends using a specific type of oil that meets certain industry standards and viscosity grades. Consulting your owner's manual is the best way to determine the exact oil specification for your vehicle. Generally, Subaru Imprezas often require synthetic or synthetic blend oils to provide optimal lubrication and protection in various driving conditions. Synthetic oils are engineered to offer superior resistance to breakdown, even under high temperatures and demanding driving conditions. They also contain additives that help to keep the engine clean and prevent the formation of sludge and deposits. Using the correct oil type ensures that your engine receives the necessary lubrication and protection, preventing premature wear and tear. Additionally, using the recommended oil can improve fuel efficiency and reduce emissions. It's important to avoid using generic or low-quality oils that may not meet the specific requirements of your Subaru Impreza, as this could lead to engine damage and decreased performance. Therefore, always refer to your owner's manual and choose a reputable brand of oil that meets the recommended specifications for your vehicle.

Tools and Materials You'll Need

Alright, let's gather everything you'll need for this oil change adventure! Having the right tools and materials on hand will make the process smoother and more efficient. Here's a checklist:

New Oil: Check your owner's manual for the correct type and amount. Usually, it's around 4.4 quarts of 0W-20 synthetic oil.
New Oil Filter: Again, check your owner's manual for the correct part number. A good quality filter is essential.
Wrench: To remove the oil drain plug. The size is typically 17mm or 14mm, but double-check to be sure.
Oil Filter Wrench: This will help you remove the old oil filter.
Drain Pan: To catch the old oil. Make sure it's large enough to hold all the oil.
Funnel: To pour the new oil into the engine without making a mess.
Gloves: To keep your hands clean.
Rags or Shop Towels: For wiping up any spills.
Jack and Jack Stands (Optional): To lift the car for easier access. Safety first! Never work under a car supported only by a jack.
Wheel Chocks (Optional): For added safety.

Having all these items ready before you start will make the oil change process much easier and more organized. Trust me, you don't want to be running to the store in the middle of the job!

Step-by-Step Guide to Changing Your Oil

Okay, let's get down to the nitty-gritty! Here's a step-by-step guide to changing the oil in your 2018 Subaru Impreza. Follow these instructions carefully, and you'll be a pro in no time!

Prepare Your Car: Park your Impreza on a level surface and engage the parking brake. If you're using a jack and jack stands, loosen the lug nuts on the front wheels, then jack up the car and securely place it on jack stands. Always use jack stands for safety! Chock the rear wheels for extra security.
Locate the Oil Drain Plug: Crawl under the car and find the oil drain plug on the bottom of the oil pan. It's usually a large bolt.
Position the Drain Pan: Place the drain pan under the oil drain plug to catch the old oil.
Remove the Drain Plug: Using the correct size wrench, carefully loosen and remove the drain plug. Be careful, as the oil may be hot!
Let the Oil Drain: Allow all the old oil to drain completely into the drain pan. This may take 15-20 minutes.
Remove the Old Oil Filter: While the oil is draining, locate the oil filter. Use the oil filter wrench to loosen and remove the old oil filter. Be prepared for some oil to spill, so keep a rag handy.
Prepare the New Oil Filter: Lightly lubricate the rubber gasket on the new oil filter with fresh oil. This will help create a good seal.
Install the New Oil Filter: Screw the new oil filter onto the engine by hand until it's snug. Then, tighten it an additional 3/4 turn with the oil filter wrench. Do not overtighten!
Reinstall the Drain Plug: Once all the oil has drained, clean the drain plug and install a new crush washer (if you have one). Tighten the drain plug to the manufacturer's specified torque. Do not overtighten! If you don't have a torque wrench, tighten it snugly but not excessively.
Lower the Car (If Applicable): If you used a jack and jack stands, carefully lower the car back to the ground.
Add New Oil: Open the hood and locate the oil fill cap. Remove the cap and insert a funnel. Pour in the correct amount of new oil, as specified in your owner's manual. Start with slightly less than the recommended amount, as you can always add more later.
Check the Oil Level: Use the dipstick to check the oil level. The oil level should be between the minimum and maximum marks on the dipstick. Add more oil if necessary.
Start the Engine: Start the engine and let it run for a few minutes. Check for any leaks around the oil drain plug and oil filter.
Check the Oil Level Again: After running the engine, turn it off and let it sit for a few minutes. Check the oil level again and add more oil if necessary.
Reset the Oil Life Monitor: Consult your owner's manual for instructions on how to reset the oil life monitor.

Congratulations! You've successfully changed the oil in your 2018 Subaru Impreza. Now, let's talk about what to do with that old oil.

Proper Disposal of Used Oil

Okay, guys, don't just dump that used oil down the drain or in your backyard! That's a big no-no for the environment. Used oil is a hazardous waste and needs to be disposed of properly. Here's how:

Store the Used Oil: Carefully pour the used oil into a sealed container, such as the empty oil bottles from the new oil.
Take it to a Recycling Center: Most auto parts stores and recycling centers will accept used oil for free. Check with your local stores to see if they offer this service.
Don't Mix it with Other Fluids: Keep the used oil separate from other fluids, such as antifreeze or brake fluid.

Proper disposal of used oil is crucial for protecting our environment. By taking a few extra minutes to dispose of it correctly, you're doing your part to keep our planet clean.

Tips and Tricks for a Smooth Oil Change

Here are a few extra tips and tricks to make your oil change even smoother:

Warm Up the Engine: Before you start, run the engine for a few minutes to warm up the oil. This will help it flow more easily.
Use a New Crush Washer: Always use a new crush washer on the drain plug to ensure a good seal.
Don't Overtighten: Overtightening the drain plug or oil filter can damage the threads. Tighten them snugly but not excessively.
Keep a Rag Handy: Spills happen! Keep a rag handy to wipe up any messes.
Double-Check Everything: Before you start the engine, double-check that everything is tightened and secure.

By following these tips and tricks, you can make your oil change a breeze!

Conclusion

So, there you have it! Changing the oil in your 2018 Subaru Impreza is a relatively simple task that you can easily do yourself. By following this guide and taking your time, you can save money and keep your Impreza running smoothly for years to come. Remember to always prioritize safety and dispose of used oil properly. Happy wrenching, guys!