A 2021 Honda Civic Sport uses 0W-20 full-synthetic engine oil.
The 1.5-liter turbocharged engine in this model requires a 0W-20 synthetic oil that meets API SN or newer specifications, and ILSAC GF-6. Use a full‑synthetic oil either Honda Genuine or an equivalent that meets the latest API/GF-6 standard. Always follow the Maintenance Minder and refer to the owner’s manual for exact service intervals and capacity.
Oil specifications for the 2021 Civic Sport
To guide owners in selecting oil that sustains performance and efficiency, here are the official specifications and practical guidelines.
- Viscosity: 0W-20
- Oil type: Full synthetic
- Certification: API SN+ (or newer) and ILSAC GF-6 (or newer)
- Service interval: Follow Honda's Maintenance Minder; typical interval is about 7,500 miles under normal driving conditions, sooner under severe conditions
In short, use a 0W-20 full-synthetic oil that meets the API SN+/GF-6 spec, and follow the maintenance minder for replacement intervals.
Honda Genuine oil vs aftermarket options
Honda recommends using Honda Genuine 0W-20 or an equivalent from reputable brands that meets the same specifications. Aftermarket oils that carry API SN+/GF-6 and 0W-20 viscosity are generally acceptable, provided they are labeled as full synthetic and meet the required standards. Avoid oils that do not meet the specified viscosity or certification, as they can affect engine performance or warranty coverage. When in doubt, consult a dealer or technician.
Summary
The 2021 Honda Civic Sport runs on 0W-20 full‑synthetic oil that meets API SN+ and ILSAC GF-6 specifications. Use either Honda Genuine or a reputable aftermarket oil that meets the same standards, and adhere to the Maintenance Minder for servicing intervals. Always reference the owner’s manual for the exact capacity and schedules.