The Civic Si uses 0W-20 full synthetic motor oil.
For most recent Civic Si models with the 1.5-liter turbo engine, the manufacturer specifies a 0W-20 grade that meets API SN/SP and ILSAC GF-6 standards. The exact oil capacity and any year-specific nuances can vary, so always consult your owner’s manual or Honda’s official maintenance data for your exact model and market.
Oil grade and capacity for the Civic Si
In practice, owners typically use 0W-20 full synthetic oil designed for modern Honda engines. Use oil that meets or exceeds API SN/SP and ILSAC GF-6, and choose a reputable brand or Honda Genuine oil. The approximate oil capacity including the filter is around 3.7 quarts, though exact figures can vary by year and configuration; always confirm with your manual and check the dipstick after refilling.
What you’ll need to complete an oil change on a Civic Si:
- 0W-20 full synthetic oil that meets API SN/SP and ILSAC GF-6 (or latest standard).
- Replacement oil filter compatible with the 1.5L turbo engine.
- Appropriate drain pan, funnel, and tools; consider a new drain plug washer if needed.
- Honda Genuine oil and filter kit or a high-quality equivalent from a reputable brand.
With the right oil and filter, the Civic Si maintains its performance and efficiency while protecting the turbocharged engine. Always follow the service intervals and viscosity guidance in your owner’s manual or Honda's official maintenance information.
Model-year notes
Recent Civics (2016–present)
The current generation Civic Si with the 1.5-liter turbo engine generally requires 0W-20 full synthetic oil meeting API SN/SP and ILSAC GF-6 standards. Oil capacity is approximately 3.7 quarts with the filter. Use Honda Genuine oil or a reputable equivalent rated for 0W-20.
Older generations
Oil specifications vary by generation. If you own an older Civic Si, refer to the specific owner's manual or service bulletin for the correct viscosity and specification for that year.
Summary
For modern Honda Civic Si models, the recommended oil is 0W-20 full synthetic, with an approximate capacity of 3.7 quarts including the filter. Use an oil that meets API SN/SP and ILSAC GF-6 standards, and always verify the exact requirements for your year and market in the owner’s manual. Regularly follow the noted service intervals to maintain performance and longevity.