The 2019 Honda Civic Si uses 0W-20 synthetic engine oil, with a capacity of about 4.0 quarts (3.8 L) when changing the filter. The oil should meet API SN or newer standards and ILSAC GF-5.
Below is a detailed guide to the oil requirements for the 2019 Civic Si, including the recommended grade, specifications, capacity, and practical notes for maintenance and oil changes.
Oil specifications
Before listing the specifications, it helps to understand the core requirements for the Civic Si’s turbocharged engine.
- 0W-20 synthetic engine oil
- API Service Classification SN or newer
- ILSAC GF-5 compliance (or newer)
- Oil capacity: about 4.0 quarts (3.8 L) with filter
- Use Honda Genuine Motor Oil or an equivalent that meets the above specifications
These requirements are designed to provide reliable lubrication, optimal fuel economy, and protection for the turbocharged powerplant in all typical driving conditions.
Capacity and oil-change considerations
Oil capacity and maintenance timing can vary with driving style and conditions. The Civic Si relies on its maintenance minder to indicate when an oil change is due, but there are general guidelines to keep in mind.
- Oil capacity: roughly 4.0 quarts (3.8 L) with a filter
- Typical oil-change interval under normal driving with synthetic 0W-20: up to about 7,500 miles (subject to maintenance minder)
- Severe driving conditions (extremely hot/cold climates, short trips, heavy loads, or frequent spirited driving) may prompt more frequent changes
Following the recommended OCI (oil change interval) provided by the maintenance minder or the owner’s manual helps sustain engine performance and longevity in the Civic Si.
Brand options and practical tips
Choosing the right oil involves ensuring the product meets the required specifications and viscosity. The list below covers common options you’ll see at retailers and service centers.
- Honda Genuine 0W-20 engine oil
- Other 0W-20 synthetic oils that meet API SN or newer and ILSAC GF-5
- Always verify the label for 0W-20 viscosity and GF-5 (or newer) compliance
When in doubt, consult the owner's manual or a qualified technician to confirm compatibility with your particular climate and driving style. Using an oil that meets the specified standards is essential for warranty coverage and engine protection.
Summary
For a 2019 Honda Civic Si, use 0W-20 synthetic engine oil that meets API SN or newer and ILSAC GF-5 standards. The approximate oil capacity is 4.0 quarts (3.8 L) with a filter. Use Honda Genuine Oil or a high-quality equivalent, and follow the maintenance minder guidance for oil-change intervals to maintain performance and reliability.