The 2011 Honda Civic generally uses 5W-20 motor oil, with the high-performance Civic Si usually requiring 5W-30. Always verify the exact specification in your owner's manual or on the under-hood oil cap, since engine options and climate can influence the recommended grade.
Oil requirements by engine
The 2011 Civic offered two engines in the U.S. lineup. Here are the recommended oil viscosities and standards for each engine family.
1.8-liter engine (LX/EX/EX-L)
- Recommended viscosity: 5W-20
- Quality/spec: API SN or newer, ILSAC GF-5 or newer
- Oil type: Conventional, synthetic blend, or full synthetic that meets the above spec
- Approximate oil capacity (with filter): about 3.5–3.7 quarts
Note: In some climates or situations, Honda acknowledges that a different grade may be acceptable if specified in the manual; always follow the official guidance for your vehicle.
2.0-liter engine (Si)
- Recommended viscosity: 5W-30
- Quality/spec: API SN or newer, ILSAC GF-5 or newer
- Oil type: Synthetic or synthetic blend meeting the above spec
- Approximate oil capacity (with filter): about 4.4–4.8 quarts
Note: The Si’s higher-performance engine is typically tuned for 5W-30; avoid using grades not specified in the manual unless advised by Honda.
Choosing the right oil and timing
For best results, select an oil that meets the API SN or newer and ILSAC GF-5 (or newer) standards and opt for a synthetic or synthetic-blend formulation if possible. Use Honda Genuine Motor Oil or an equivalent that carries a matching specification. If you live in extremely hot or cold climates, or if your owner’s manual provides an alternative grade for your situation, follow that guidance.
Oil capacity and maintenance note
Oil capacity varies by engine: roughly 3.5–3.7 quarts for the 1.8L and about 4.4–4.8 quarts for the 2.0L Si (both with filter). Always perform a final check with the dipstick after a fill and during routine changes to ensure the level sits within the marked range.
How to maintain your oil routine
Regularly check the oil level and condition between changes, and adhere to the service interval recommended in the owner's manual. If you’re unsure about the correct grade or change interval, consult a Honda technician or reference the manual specific to your VIN.
Summary
In short, most 2011 Civics take 5W-20 oil, while the Civic Si uses 5W-30. Use an oil that meets API SN or newer and ILSAC GF-5 or newer, and choose a synthetic or synthetic-blend formulation for better protection. Confirm exact requirements for your engine variant and climate in the official manual, and maintain proper oil level for optimal performance.