The 2018 Forester generally requires 0W-20 synthetic engine oil. This applies to the standard 2.5L engine and, in many trims, the optional 2.0L turbo as well. Always verify the exact specification in your owner’s manual for your specific trim and climate.
In the 2018 model year, Subaru offered two possible engines: a 2.5L flat-four as the common setup and, in higher trims, a 2.0L turbo. Subaru typically specifies 0W-20 synthetic oil for both engines to optimize performance, fuel economy, and long-term engine health. For precise guidance tailored to your vehicle, consult the owner’s manual and obey climate-related recommendations.
Oil type by engine variant
These guidelines reflect the engines that may appear in the 2018 Forester. Use the oil type listed for your engine variant.
- 2.5L naturally aspirated engine (FB25): 0W-20 synthetic oil (full synthetic).
- 2.0L turbo engine (2.0XT, when equipped): 0-20 synthetic oil (full synthetic).
Using the recommended 0W-20 synthetic oil helps with cold-start protection, consistent lubrication, and fuel efficiency across a wide temperature range. If in doubt, consult the owner's manual or your dealer.
Practical tips for oil selection and maintenance
Before applying oil or planning changes, consider these guidelines to ensure you stay compliant with maintenance and warranty terms.
- Choose an oil that meets Subaru's specification: 0W-20, API SN+ or newer, and ILSAC GF-6 rating where applicable, labeled as synthetic.
- Prefer Subaru-approved or OEM-specified synthetic oils; many brands offer oils that meet this spec.
- Follow the maintenance schedule for oil changes in the owner's manual; synthetic oil often allows longer intervals, but severe driving conditions (extreme heat or cold, lot of stop-and-go) may require shorter intervals.
- Ensure correct oil capacity and proper oil level after changes to avoid overfill or low-oil conditions.
Adhering to these guidelines helps protect engine reliability, performance, and warranty terms.
Summary
For the 2018 Subaru Forester, the recommended engine oil is 0W-20 synthetic for both the standard 2.5L engine and the available 2.0L turbo. Always verify your exact trim in the owner’s manual and follow climate-specific guidance, performing regular oil changes with the correct grade to maintain performance and longevity.
What oil should I put in a Subaru Forester 2018?
For most new Subaru Forester models, the preferred oil is 0W-20 synthetic, engineered to meet the demands of its versatile nature.
What color is the hardest to keep clean on the Forester?
Greys/silver (and white & bronze) are always easiest to keep clean externally. Black and the blue will always show the dirt and have to be washed far more often (unless you're already OCD and wash your car often regardless of color, and then this won't be an issue for you).
Does a 2018 Subaru need synthetic oil?
Answer: Subaru officially recommends SAE 0W-20 full synthetic oil for all Crosstrek models from 2018 through 2025, including both the 2.0L and 2.5L Boxer engines. This oil is engineered to optimize performance, protect the engine under extreme conditions, and maintain fuel efficiency.
Does a Subaru Forester need synthetic oil?
Synthetic oil is designed to handle extreme temperatures and conditions, perfect for the Subaru Forester's versatile and adventurous nature. The majority of recent Subaru Forester models require 0W-20 synthetic oil, though the correct Subaru Forester oil type can vary.