2016 Subaru Crosstrek Coolant Capacity & Type Guide

The 2016 Subaru Crosstrek holds between 7.4 and 7.6 US quarts (7.0 to 7.2 liters) of engine coolant, depending on your transmission type. As an ASE-certified master technician, I frequently get asked about Subaru cooling systems because maintaining the right fluid level and chemistry is critical for the longevity of the flat-four "boxer" engine. Whether you are topping off the reservoir or performing a complete system flush, using the right fluid and bleeding the system properly is paramount.

Quick answer

Here is the essential information you need before buying coolant or servicing your 2016 Subaru Crosstrek's cooling system:

• Total cooling system capacity: 7.4 US quarts (7.0 L) for manual transmissions; 7.6 US quarts (7.2 L) for Continuously Variable Transmissions (CVT).
• OEM coolant spec: Subaru Super Coolant. It is a Blue P-OAT (Phosphated Organic Acid Technology) non-amine, non-silicate formula. The OEM part number is typically SOA868V9270.
• Mix ratio: 50/50 mix of coolant and deionized/distilled water. Most OEM Subaru Super Coolant is sold pre-mixed (50/50), making it ready to pour straight out of the bottle.

Capacity by engine option

The 2016 Subaru Crosstrek only came with one standard engine block—the 2.0L FB20 naturally aspirated 4-cylinder—but capacity varies slightly based on the transmission.

Note: The Hybrid model features additional cooling system components for the electrical systems, but the primary engine block capacity remains similar to the standard CVT model.

Flush interval

Subaru utilizes a long-life coolant that outlasts older green IAT formulas, but it still degrades over time and requires replacement to protect the engine's aluminum components.

• Normal Duty: The initial factory fill is rated for an impressive 11 years or 137,500 miles (whichever comes first). After the first replacement, the service interval drops to every 6 years or 75,000 miles.
• Severe Duty: If you frequently tow, idle for extensive periods, drive in dusty conditions, or live in extreme climates, it is recommended to inspect the coolant's pH and freeze point every 30,000 miles. Consider flushing at the 75,000-mile mark initially to ensure maximum corrosion protection.

How to refill & bleed

Because of the horizontally opposed "boxer" engine layout, air bubbles can easily get trapped in the cylinder head water jackets. Trapped air will cause the engine to overheat and the heater to blow cold air.

1. Drain the system: With the engine cold, remove the plastic splash shield underneath, open the radiator petcock, and let the old coolant drain into a catch pan.
2. Vacuum Fill (Recommended): The absolute best way to refill a Subaru cooling system is by using a pneumatic vacuum coolant filler. This tool draws the system into a vacuum and sucks the new fluid in, completely eliminating trapped air.
3. Manual Spill-Free Funnel Method: If you don't have a vacuum tool, attach a spill-free funnel to the radiator neck. Slowly pour in the 50/50 pre-mixed Subaru Super Coolant.
4. Bleed the air: Start the engine and turn the climate control heater to the absolute hottest setting with the fan on low (this opens the heater core).
5. Burp the system: Let the engine idle until it reaches operating temperature and the radiator fans cycle on. Gently squeeze the upper and lower radiator hoses to force stubborn air bubbles up into the funnel.
6. Final top-off: Once the bubbles stop and the fans cycle, shut off the engine. Let it cool, remove the funnel, install the radiator cap, and fill the plastic expansion reservoir to the "FULL" line.

Common cooling system issues

The 2016 Crosstrek's cooling system is generally very reliable, but as these vehicles age, there are a few things to watch out for:

• Sticking Thermostats: The thermostat is located at the bottom of the engine near the water pump. As they age, they can stick closed, causing rapid overheating, or stick open, causing the engine to run too cool (resulting in poor fuel economy and a Check Engine Light).
• Radiator Seam Leaks: At higher mileage (100k+), the crimped seam where the plastic radiator tanks meet the aluminum core can begin to weep blue crusty coolant.
• Heater Core Blockage: If regular coolant flushes are neglected, the heater core can become restricted, leading to poor cabin heating performance.

If you aren't comfortable vacuum-filling the system yourself or need help tracking down a coolant leak, don't risk overheating your engine. Find a trusted shop on Repairius.