The 2018 Civic is designed to run on 0W-20 synthetic engine oil, meeting API SN or newer standards. This viscosity applies to both the 1.5L turbo and the 2.0L engine options.
Engine options and oil requirements
The Civic lineup for 2018 includes two main engines: a 1.5-liter turbocharged four-cylinder and a 2.0-liter naturally aspirated four-cylinder. Honda specifies the same oil viscosity for both engines to optimize performance and fuel efficiency.
1.5L turbocharged engine (L15B7)
Oil grade: 0W-20 synthetic is recommended. Use oil that meets API SN or newer, ILSAC GF-5. Honda Genuine Motor Oil 0W-20 is preferred, though other brands that meet the same specifications are acceptable.
2.0L naturally aspirated engine
Oil grade: 0W-20 synthetic is recommended, with the same API SN or newer and ILSAC GF-5 requirements. The service expectations are similar to the turbo engine.
Recommended oil types and specs
The following options meet Honda's specification for the 2018 Civic. Ensure the product you choose matches the viscosity and standard requirements listed below.
- 0W-20 full synthetic engine oil that meets API SN or newer and ILSAC GF-5
- Honda Genuine Motor Oil 0W-20
- High-quality 0W-20 synthetic blend that meets API SN or newer (if a full synthetic is unavailable)
For best results, always verify the oil's specification on the bottle and refer to the owner's manual for exact requirements for your trim and market. Using the wrong viscosity or non-compliant oil can affect engine performance and warranty coverage.
Maintenance and best practices
Follow the maintenance minder system and schedule oil changes accordingly. Typical intervals vary with driving conditions, but consult the owner's manual or your dealer for the recommended service timeline and to ensure warranty validity.
Summary
In short, a 2018 Honda Civic uses 0W-20 synthetic engine oil (API SN or newer), regardless of whether it has the 1.5L turbo or the 2.0L engine. Use Honda Genuine 0W-20 or another reputable brand that meets the same specifications, and consult the owner's manual for climate-specific guidance or any exceptions.