The 2019 Civic Si, with its turbocharged 1.5-liter engine, calls for synthetic 0W-20 oil that meets API SN or newer standards. The engine’s oil capacity is roughly 3.7 quarts with a filter, and changes should follow Honda’s Maintenance Minder guidance to protect performance and longevity.
Oil grade and specification
Recommended oil type
To keep the turbocharged 1.5L engine running cleanly and efficiently, use a synthetic 0W-20 oil that meets API SN or newer, and ILSAC GF-5 or newer. Honda Genuine 0W-20 is a reliable option, but any reputable brand that specifies 0W-20 with the required API/GF-5 certification is acceptable.
Before listing the common choices, note that the goal is to ensure quick-start lubrication, robust high-temperature protection, and compatibility with turbocharged operation. The following options align with those requirements:
- 0W-20 synthetic oil that meets API SN or newer and ILSAC GF-5 or newer
- Brand-agnostic choice: Honda Genuine or another reputable 0W-20 synthetic product that carries the API SN/GF-5 certification
- Avoid thicker oils such as 5W-30 or 10W-40 unless otherwise specified by Honda for a particular climate or condition
Using the correct specification helps protect the engine during high-rpm driving common to the Si, particularly in warm-weather and performance scenarios.
Oil capacity and maintenance intervals
How much to pour and when to change
The Civic Si’s engine holds about 3.7 quarts (roughly 3.5 liters) of oil with a filter. Oil changes should follow Honda’s Maintenance Minder system, which uses driving data to determine when service is due. Under typical conditions with a synthetic 0W-20, many drivers see intervals in the 5,000–7,500-mile range, but severe conditions (short trips, heavy traffic, extreme heat or cold) can shorten that window.
To help you navigate the interval, consider these guidelines:
- Oil capacity: approximately 3.7 quarts (3.5 liters) with filter
- Recommended oil: synthetic 0W-20 meeting API SN or newer; GF-5 or newer
- Change interval: follow the Maintenance Minder; typical range often falls between 5,000–7,500 miles under normal driving
Always verify the exact capacity and recommended interval in your vehicle’s owner manual or on the maintenance minder display, as regional specs or model year updates can vary slightly.
Practical considerations for owners
Buying and maintaining the right oil
When shopping for oil, prioritize synthetic 0W-20 that clearly lists API SN or newer and GF-5 or newer on the label. If you’re unsure, choose Honda Genuine 0W-20 or an equivalent brand with documented certification. Don’t skip the oil filter—install a new filter at every oil change to maintain filtration effectiveness and engine protection.
After selecting the oil, ensure you pour the correct amount and recheck the level with the dipstick once the oil settles. If you’re driving in extreme conditions or using the car for frequent spirited driving, consider shortening the interval as indicated by the Maintenance Minder.
Summary
For the 2019 Honda Civic Si, the recommended oil is synthetic 0W-20 that meets API SN or newer and ILSAC GF-5 or newer. The engine oil capacity is about 3.7 quarts with a filter, and oil changes should follow Honda’s Maintenance Minder system, typically within a 5,000–7,500 mile range under normal conditions, with shorter intervals in demanding driving scenarios. Choose Honda Genuine 0W-20 or a reputable equivalent that carries the proper certifications to ensure optimal protection for the turbocharged 1.5L engine.