The 2019 Subaru Impreza requires a high-quality synthetic 0W-20 engine oil that meets API SN or newer standards, with ILSAC GF-5 or newer endorsement. This viscosity is specified for the 2.0-liter boxer engine used in that year’s Impreza and is chosen to balance lubrication, cold-start performance, and fuel efficiency.
This article explains the official specification, why it matters, and how to keep your engine properly oiled—covering exact viscosity, certification standards, capacity, and intervals so you can choose the right product and maintain the vehicle properly.
Official oil specification for the 2019 Impreza
The 2019 Impreza uses a 2.0-liter flat-four engine. Subaru’s guidance for this engine is to use 0W-20 synthetic oil that meets API SN or newer standards, with ILSAC GF-5 or newer endorsement. This viscosity supports smooth cold starts and efficient operation across typical driving conditions.
- Viscosity: 0W-20
- Oil type: Full synthetic recommended
- Certification: API SN or newer, ILSAC GF-5 or newer
- Capacity (with filter): roughly 4.0–4.5 quarts
- Label to look for: 0W-20, API SN or newer, ILSAC GF-5 or newer
Bottom line: If your vehicle is factory stock, stick with 0W-20 synthetic to preserve performance and warranty compliance.
Maintenance guidance: oil change intervals
With synthetic 0W-20, Subaru commonly prescribes oil changes every 6,000 miles or every 6 months under normal driving, whichever comes first. If you drive under severe conditions—short trips, heavy traffic, extreme temperatures, or dusty environments—consider shortening the interval to 3,000–5,000 miles or 3–6 months, or follow the vehicle's dashboard oil-life indicator if equipped.
- Normal driving interval: about every 6,000 miles or 6 months
- Severe driving interval: typically 3,000–5,000 miles or 3–6 months
- Always use a compatible oil filter and check level
- Monitor oil consumption and leaks; top off as needed between changes
Adhering to these intervals helps protect the engine against friction, deposits, and wear, supporting longevity and performance.
Practical tips for selecting oil
When shopping, verify the oil label states 0W-20 and that it meets API SN or newer and ILSAC GF-5 or newer. Sub-brand options include Subaru’s own synthetic oil lineup or reputable national brands that certify to the same specifications. Avoid oils with incorrect viscosities or older certification standards to ensure compatibility with the engine’s tolerances.
Additionally, if you have an extended warranty or a specific driving regime (e.g., high mileage, towed loads, or extreme temperatures), consult your dealership for any model-year-specific recommendations.
Buying tips and brand options
Choosing the right product is not only about viscosity but also the certification standards and your local climate. Most major brands offer 0W-20 synthetic oils that meet API SN and ILSAC GF-5, and Subaru’s official oil is widely available. Your dealer or service professional can confirm the correct product for your vehicle’s trim and usage.
In short: 0W-20 synthetic oil that meets API SN and ILSAC GF-5 is the safe, recommended choice for the 2019 Impreza.
Summary
The 2019 Subaru Impreza requires a high-quality synthetic 0W-20 engine oil that meets API SN or newer and ILSAC GF-5 or newer standards. Plan for about 4.0–4.5 quarts per change, and follow a 6,000-mile/6-month maintenance interval under normal driving (shorter if you drive in severe conditions). Always verify the exact capacity and any climate-specific recommendations in your owner's manual or with a Subaru dealer. By sticking to these guidelines, you can help ensure smooth starts, efficient operation, and long engine life.