Can I use 5W-30 instead of 0w20 in Subaru Forester?
The short answer is: it is generally not recommended to use 5W-30 motor oil instead of the recommended 0W-20 in a Subaru Forester. The owner's manual for the Subaru Forester specifically calls for 0W-20 oil, and using a different viscosity can potentially cause engine damage or reduce fuel efficiency.
Understanding Oil Viscosity Ratings
Motor oil viscosity is denoted by a number and letter combination, such as 0W-20 or 5W-30. The first number represents the oil's cold weather viscosity, while the second number represents its viscosity at normal operating temperatures. A lower number indicates a thinner, more free-flowing oil that is better suited for cold weather starts. A higher number indicates a thicker oil that provides more protection at high temperatures.
The Subaru Forester is designed to use 0W-20 oil, which means it requires a very thin, free-flowing oil for cold weather performance and fuel efficiency. Using a thicker 5W-30 oil could result in increased engine drag, reduced fuel economy, and potentially inadequate lubrication during cold starts.
Potential Consequences of Using the Wrong Oil
- Reduced Fuel Efficiency: The thicker 5W-30 oil may increase engine drag, leading to decreased fuel economy.
- Inadequate Lubrication: The 0W-20 oil is engineered to provide optimal lubrication at cold temperatures. Using a thicker 5W-30 could result in insufficient oil flow during cold starts, potentially causing accelerated wear on engine components.
- Engine Damage: In extreme cases, using the wrong oil viscosity can lead to increased friction, heat buildup, and even engine damage over time.
It's important to always follow the manufacturer's recommendations for oil viscosity to ensure the proper operation and longevity of your Subaru Forester's engine.
Conclusion
In summary, it is not recommended to use 5W-30 motor oil instead of the specified 0W-20 in a Subaru Forester. Doing so could result in reduced fuel efficiency, inadequate lubrication, and potential engine damage. Always consult your owner's manual and use the recommended oil viscosity to keep your Subaru Forester running at its best.
What engine oil does Subaru recommend?
Subaru Oil Guide:
| Model | Subaru Oil Required | Capacity |
|---|---|---|
| Subaru WRX 2011 - 2020 | 5W-30 Synthetic Oil | 4.4 - 5.4 Quarts |
| Subaru Crosstrek 2013 - 2021 | 0W-20 Synthetic Oil | 4.4 - 5.1 Quarts |
| Subaru Crosstrek Hybrid 2014 - 2021 | 0W-20 Synthetic Oil | 4.4 - 5.1 Quarts |
| Subaru Ascent 2019 - 2021 | 0W-20 Synthetic Oil | 4.8 Quarts |
Is 0W-20 good for hot weather?
0W-20, for example, is rated at 104°F (40°C) for external temperatures, and 212°F (100°C) for internal engine temperatures. So, the 0W rating of most oils, including ENEOS, is within operational parameters of warmer climates like Hawaii, Phoenix, and Las Vegas.
Can I use 5W-30 in a Subaru Forester?
Any Subaru Forester after 2011 requires synthetic oil. Newer models after 2011 with a non-turbocharged engine take 0W-20 oil, whereas turbocharged engine models require 5W-30 oil.
What is the best oil to run in a Subaru?
Recommended Subaru Outback Oil Type
For engines that aren't turbo-charged, 0W-20 synthetic oil is your best Subaru Outback oil type. For older Subaru Outback models, the engine will thrive with a higher viscosity, so if your Outback has seen some miles and years, you can choose 5W-30 synthetic oil.
What happens if I use 5W-30 instead of 0w30?
A 0W-30 grade can operate at much lower temperatures than a 5W-30 as the oil will flow faster thereby protecting the engine at an earlier stage. Some engines are not suited for a 0W-30, always check your owner's manual before adding oil to your engine.
Why does Subaru use 0W-20 oil?
Genuine Subaru Oil is the only motor oil specifically formulated for the unique design and operation of the SUBARU BOXER® engine. It's engineered to clean and protect internal components between oil changes better than most leading aftermarket brands for a lifetime of miles.
Can I use 5W instead of 0W-20?
If SAE 0W-20 synthetic oil is not available, SAE 5W-20 conventional oil may be used. However, it must be replaced with SAE 0W-20 synthetic oil at the next oil change.
What oil does Subaru prefer?
Most new Subaru vehicles require synthetic oil with a viscosity rating of 0W-20.
Can I use 5W-30 instead of 0W-20 Subaru?
Synthetic oil-specifically 0W-20-is highly recommended for optimal engine performance and protection. If synthetic oil isn't available at the time of an oil change, 5W-30 conventional oil may be used instead. However, it should be replaced with synthetic oil at the next change.
Is there a big difference between 0W-20 and 5W-30?
Viscosity Difference: The primary difference between 0W-20 and 5W-30 is their viscosity at low temperatures. 0W-20 is thinner at colder temperatures, which can be beneficial for cold starts. Using 5W-30 may result in slightly less protection during those initial moments when the engine is cold.
