If you're adding oil between changes on your 2019 Crosstrek, you're not alone. Oil consumption has been reported in some FB20 2.0L boxer engines. Understanding the consumption rate and available remedies helps you decide how to proceed.
The FB20 Engine Context
The 2019 Crosstrek uses the FB20 2.0L boxer engine. While improvements have been made over earlier designs, some FB20 engines exhibit oil consumption related to piston ring characteristics.
What's Acceptable
Subaru has stated various consumption thresholds, but realistic expectations are:
- Normal: Little to no oil added between 6,000-mile changes
- Concerning: 1 quart per 3,000+ miles
- Excessive: 1 quart per 1,000-2,000 miles
- Severe: More than 1 quart per 1,000 miles
Symptoms of Oil Consumption
- Oil level drops between services
- Low oil warning light
- Blue smoke on deceleration
- Oily residue on tailpipe
- Fouled spark plugs
Why It Happens
- Piston ring design - Low-tension rings for efficiency may not seal perfectly
- PCV system - Can pull oil mist into intake
- Driving style - Short trips don't allow full ring sealing
- Extended oil change intervals - Oil breaks down, accelerates wear
What You Can Do
- Track consumption precisely over several months
- Use Subaru-approved 0W-20 synthetic oil
- Avoid extended idle periods
- Take occasional longer highway drives
- Keep oil changes on schedule (not extended)
Repair Options
- PCV valve replacement: $50-$150
- Short block replacement: $4,000-$7,000
- Engine replacement: $5,000-$8,000
Warranty Consideration
If consumption exceeds Subaru's threshold and you're within warranty, document everything and request an official consumption test.