2018 Subaru WRX: Oil Capacity Guide

by Alex Braham 36 views

Hey guys! If you're a proud owner of a 2018 Subaru WRX, you know how important it is to keep that engine purring like a kitten (a very powerful, turbocharged kitten!). One of the most crucial aspects of maintaining your WRX is ensuring it has the correct oil level. So, let's dive into the specifics of the 2018 Subaru WRX oil capacity and everything you need to know to keep your ride running smoothly.

Understanding the 2018 Subaru WRX Oil Capacity

Knowing the exact oil capacity for your 2018 WRX is the first step in performing a successful oil change. The oil capacity refers to the total amount of oil your engine needs to function optimally. Too little oil can lead to engine damage due to increased friction and heat, while too much oil can cause issues like foaming, which reduces the oil's lubricating properties. For the 2018 Subaru WRX, the oil capacity is approximately 5.1 quarts (4.8 liters) when you're also replacing the oil filter. This is a crucial number to remember, as it will guide you during your oil changes. Always double-check your owner's manual, as slight variations can occur based on specific engine configurations or model updates. Using the correct amount of oil ensures that all engine components are adequately lubricated, reducing wear and tear and extending the life of your engine. The oil not only lubricates but also helps to cool the engine by dissipating heat. Insufficient oil can lead to overheating, which can cause significant damage to critical engine parts like the pistons, bearings, and cylinder heads. Overfilling the oil can be equally problematic. When there's too much oil, the crankshaft can churn it into a frothy mixture, introducing air bubbles that reduce the oil's ability to protect the engine. This can result in decreased engine performance and potential damage to seals and gaskets due to increased pressure. Therefore, adhering to the recommended oil capacity is essential for maintaining the health and longevity of your 2018 Subaru WRX engine. Always consult your owner's manual for the most accurate and up-to-date information, as specifications can sometimes vary slightly depending on the specific model and any factory modifications. Remember, proper oil maintenance is one of the most cost-effective ways to keep your WRX running at its best. So, keep that number handy and ensure your engine gets the right amount of liquid gold every time!

Choosing the Right Oil for Your 2018 WRX

Selecting the correct type of oil is just as crucial as knowing the capacity. The 2018 Subaru WRX requires a specific oil type to ensure optimal performance and longevity. Subaru recommends using a synthetic 5W-30 oil for most driving conditions. Synthetic oil is formulated to provide better protection against wear and tear, maintain its viscosity over a wider temperature range, and resist breakdown under high-stress conditions. This is particularly important for a turbocharged engine like the one in the WRX, which generates a lot of heat. Using a non-synthetic or incorrect viscosity oil can lead to increased engine wear, reduced performance, and potentially even engine damage. When choosing an oil brand, look for products that meet or exceed the American Petroleum Institute (API) standards. These standards ensure that the oil has been tested and certified to meet certain performance criteria. Some popular and reputable brands include Mobil 1, Castrol, Pennzoil, and Amsoil. It's also a good idea to read reviews and do some research to see what other WRX owners are using and recommending. Consider your driving habits and climate when selecting an oil. If you frequently drive in extreme cold or hot conditions, you may want to choose an oil specifically designed for those environments. For example, some oils offer enhanced cold-start protection, while others are formulated to withstand high temperatures without breaking down. Always check your owner's manual for the manufacturer's specific recommendations. Subaru may have updated its oil recommendations since the 2018 model year, so it's important to stay informed. If you're unsure which oil to choose, consult with a trusted mechanic or Subaru dealership. They can provide expert advice based on your specific needs and driving conditions. Remember, investing in high-quality synthetic oil is a small price to pay compared to the cost of potential engine repairs down the road. So, do your research, choose wisely, and keep your WRX running smoothly for years to come.

Step-by-Step Guide to Changing the Oil in Your 2018 WRX

Changing the oil in your 2018 WRX is a straightforward process that can be done at home with a few basic tools. Here's a step-by-step guide to help you through the process:

  1. Gather Your Supplies: You'll need the correct amount of 5.1 quarts of synthetic 5W-30 oil, a new oil filter (Subaru OEM or a reputable brand), an oil filter wrench, a wrench for the drain plug, a drain pan, a funnel, gloves, and some shop towels.
  2. Warm Up the Engine: Start the engine and let it run for a few minutes to warm up the oil. This will help it flow more easily when you drain it. Be careful not to let the engine get too hot, as you don't want to burn yourself.
  3. Prepare the Car: Park your WRX on a level surface and engage the parking brake. Use jack stands to safely lift the front of the car. Never work under a car supported only by a jack.
  4. Locate the Drain Plug: Crawl under the car and locate the oil drain plug on the bottom of the oil pan. Place the drain pan directly underneath the plug.
  5. Remove the Drain Plug: Use the correct size wrench to loosen and remove the drain plug. Be careful as the oil may be hot. Let the oil drain completely into the pan.
  6. Replace the Oil Filter: While the oil is draining, locate the oil filter. Use the oil filter wrench to loosen and remove the old filter. Before installing the new filter, lightly lubricate the rubber gasket with fresh oil. Screw the new filter on by hand until it's snug, then tighten it another ¾ turn with the wrench.
  7. Reinstall the Drain Plug: Once the oil has completely drained, clean the drain plug and install a new crush washer. Tighten the drain plug to the manufacturer's specified torque (refer to your owner's manual or a repair manual for the correct torque specification).
  8. Add New Oil: Remove the oil filler cap on top of the engine. Place a funnel in the filler neck and pour in the new oil. Start by adding about 4.5 quarts, then check the oil level with the dipstick. Add more oil as needed to reach the