Hey guys! If you're a proud owner of a 2018 Subaru WRX, you know how important it is to keep that engine running smoothly. And one of the most crucial aspects of engine maintenance is, of course, checking and changing the oil. But do you know the correct oil capacity for your ride? Don't worry, we've got you covered! This guide will walk you through everything you need to know about the 2018 Subaru WRX oil capacity, the best types of oil to use, and some essential maintenance tips to keep your WRX purring like a kitten (or roaring like a beast, depending on how you drive it!). So, let's dive in and get those engines happy!

Understanding the 2018 Subaru WRX Oil Capacity

So, you're probably wondering, "What's the magic number for the 2018 Subaru WRX oil capacity?" Well, the 2018 Subaru WRX has an oil capacity of 5.1 quarts (4.8 liters) when you're doing an oil change with a new filter. Yes, that's the golden number you need to remember! Now, why is this important? Because having the right amount of oil is essential for keeping your engine properly lubricated and running efficiently.

Why is the correct oil capacity so crucial, you ask? Let's break it down:

1. Engine Lubrication: Oil is the lifeblood of your engine. It coats all the internal parts, reducing friction and wear. Without enough oil, those parts start grinding against each other, which can lead to some serious (and expensive) damage. Trust me, you don't want that!
2. Cooling: Oil also helps to dissipate heat. As your engine works hard, it generates a lot of heat. The oil absorbs some of this heat and carries it away, preventing the engine from overheating. If you're low on oil, your engine can overheat, leading to major problems.
3. Cleaning: Oil helps to keep your engine clean by carrying away dirt, debris, and contaminants. These particles can cause wear and reduce performance. The oil filter then traps these particles, keeping the oil clean and effective. But if you don't have enough oil, it can't do its job properly.
4. Performance: Proper oil levels ensure that your engine performs optimally. With the right amount of oil, your engine can run smoothly and efficiently, giving you the power and performance you expect from your WRX. Nobody wants a sluggish WRX, right?

What happens if you overfill or underfill the oil? Both can cause issues:

• Overfilling: Too much oil can create excessive pressure in the engine, leading to leaks and potentially damaging seals and gaskets. It can also cause the oil to foam, reducing its ability to lubricate properly.
• Underfilling: Not enough oil means inadequate lubrication, leading to increased wear and tear on engine parts, overheating, and potentially catastrophic engine failure. Seriously, don't risk it!

Checking Your Oil Level: A Quick Guide

Okay, so you know the correct oil capacity, but how do you make sure you're actually at the right level? Here’s a quick guide to checking your oil:

1. Park on a Level Surface: Make sure your car is parked on a flat surface to get an accurate reading.
2. Wait for the Engine to Cool: It's best to check the oil when the engine is cool to avoid burns and get a more accurate reading.
3. Locate the Dipstick: Pop the hood and find the oil dipstick. It usually has a bright-colored handle and is marked with an oil can symbol.
4. Pull and Wipe: Pull out the dipstick and wipe it clean with a rag.
5. Reinsert and Check: Insert the dipstick all the way back in, then pull it out again. Look at the oil level on the dipstick. There should be markings indicating the minimum and maximum levels.
6. Add Oil if Needed: If the oil level is below the minimum mark, add oil gradually until it reaches the correct level. Use the recommended oil type for your 2018 WRX.

Choosing the Right Oil for Your 2018 WRX

Now that we've nailed down the importance of oil capacity, let's talk about the type of oil you should be using in your 2018 WRX. Subaru recommends using a high-quality synthetic oil that meets certain specifications. Using the right oil will ensure optimal engine performance, longevity, and protection.

Recommended Oil Type

For the 2018 Subaru WRX, the recommended oil type is SAE 5W-30 synthetic oil. This viscosity grade is designed to provide excellent lubrication and protection in a wide range of temperatures. Synthetic oil is formulated to offer better performance and protection compared to conventional oil, especially in turbocharged engines like the one in your WRX.

Why Synthetic Oil?

• Improved Lubrication: Synthetic oils provide superior lubrication compared to conventional oils. This means reduced friction and wear on engine parts, which can extend the life of your engine.
• Better High-Temperature Performance: Synthetic oils are more resistant to breakdown at high temperatures. This is crucial for turbocharged engines that generate a lot of heat.
• Enhanced Low-Temperature Performance: Synthetic oils flow better at low temperatures, ensuring that your engine is properly lubricated even during cold starts.
• Extended Oil Change Intervals: Synthetic oils can often last longer than conventional oils, allowing for extended oil change intervals. However, always follow Subaru's recommended oil change schedule.

Key Oil Specifications

When choosing an oil for your 2018 WRX, make sure it meets the following specifications:

• API SN or SN Plus: Look for oils that meet or exceed the American Petroleum Institute (API) SN or SN Plus standards. These standards ensure that the oil provides adequate protection against wear, deposits, and other harmful effects.
• ILSAC GF-5 or GF-6: The International Lubricant Standardization and Approval Committee (ILSAC) GF-5 or GF-6 standards indicate that the oil meets certain fuel efficiency and engine protection requirements.

Popular Oil Brands for Your WRX

There are many great synthetic oil brands on the market, but here are a few popular choices among WRX owners:

• Motul: Known for its high-performance lubricants, Motul is a favorite among enthusiasts who demand the best protection for their engines.
• Mobil 1: A widely available and trusted brand, Mobil 1 offers excellent protection and performance for a variety of vehicles.
• Castrol: Castrol is another popular brand that offers a range of synthetic oils designed to meet the needs of modern engines.
• Amsoil: Amsoil is known for its high-quality synthetic oils that provide exceptional protection and performance.

Oil Additives: Yay or Nay?

You might be tempted to add oil additives to your engine, thinking they'll provide extra protection or performance. However, most modern synthetic oils already contain a balanced blend of additives designed to protect your engine. Adding extra additives can sometimes upset this balance and potentially cause more harm than good. Unless you have a specific reason to use an additive (such as addressing a particular engine issue), it's generally best to stick with a high-quality synthetic oil that meets the recommended specifications.

Essential Oil Change and Maintenance Tips

Okay, you've got the right oil and you know the correct capacity. Now, let's talk about how to keep your 2018 WRX in tip-top shape with some essential oil change and maintenance tips.

Oil Change Intervals

Subaru recommends changing the oil in your 2018 WRX every 6,000 miles or 6 months, whichever comes first. However, if you frequently drive in severe conditions (such as stop-and-go traffic, extreme temperatures, or dusty environments), you may need to change the oil more frequently. Keeping an eye on your driving habits and conditions will help you determine the best oil change interval for your WRX.

DIY Oil Change vs. Professional Service

You have two options when it comes to changing your oil: doing it yourself (DIY) or taking it to a professional service. Both have their pros and cons:

• DIY Oil Change:
  • Pros: Save money, learn about your car, and have the satisfaction of doing it yourself.
  • Cons: Requires tools, time, and some mechanical knowledge. You also need to dispose of the old oil properly.
• Professional Service:
  • Pros: Convenient, saves time, and ensures the job is done correctly. They also handle the oil disposal.
  • Cons: More expensive than doing it yourself.

Step-by-Step DIY Oil Change Guide

If you're feeling adventurous and want to tackle the oil change yourself, here's a step-by-step guide:

1. Gather Your Supplies: You'll need the correct amount of oil (5.1 quarts of 5W-30 synthetic), a new oil filter, a wrench for the oil filter, a socket wrench for the drain plug, a drain pan, gloves, and some rags.
2. Warm Up the Engine: Run the engine for a few minutes to warm up the oil. This will help it flow more easily.
3. Position the Drain Pan: Place the drain pan under the oil drain plug.
4. Remove the Drain Plug: Use the socket wrench to remove the drain plug. Be careful, as the oil will be hot!
5. Allow the Oil to Drain: Let the oil drain completely. This may take 15-20 minutes.
6. Remove the Old Oil Filter: Use the oil filter wrench to remove the old oil filter. Make sure to wipe off the mounting surface.
7. Install the New Oil Filter: Lightly lubricate the rubber gasket on the new oil filter with fresh oil. Screw the new filter on by hand until it's snug, then tighten it another ¾ turn.
8. Reinstall the Drain Plug: Clean the drain plug and install a new crush washer. Tighten the drain plug to the manufacturer's specifications.
9. Add New Oil: Remove the oil fill cap and add 5.1 quarts of new oil. Use a funnel to avoid spills.
10. Check the Oil Level: Use the dipstick to check the oil level and add more if needed.
11. Start the Engine: Start the engine and let it run for a few minutes. Check for leaks around the drain plug and oil filter.
12. Turn Off the Engine and Recheck: Turn off the engine and let it sit for a few minutes. Recheck the oil level and add more if needed.
13. Dispose of the Old Oil Properly: Take the old oil to a recycling center or auto parts store for proper disposal.

Regular Maintenance Checks

In addition to regular oil changes, it's important to perform other maintenance checks to keep your 2018 WRX running smoothly:

• Check Coolant Levels: Make sure your coolant levels are adequate to prevent overheating.
• Inspect Belts and Hoses: Check for cracks or wear on belts and hoses, and replace them if needed.
• Monitor Tire Pressure: Keep your tires properly inflated for optimal performance and fuel efficiency.
• Check Brake Pads: Inspect your brake pads regularly and replace them when they're worn.

By following these oil change and maintenance tips, you can keep your 2018 Subaru WRX running strong for years to come. Happy driving, and remember to always keep that engine properly lubricated!