Subaru oil consumption diagnosis in Chico, CA. FB25 oil consumption, EJ25 head gasket, piston ring wear. Consumption test $199.99/hr. Warranty documentation.
Subaru oil burning has two main causes: the FB25 documented piston ring issue (class action, extended warranty) on 2013-2016 models, and EJ25 head gasket internal failure on older models. Both are diagnosable. Warranty coverage may apply.
The FB25 2.5L 4-cylinder engine (replaced the EJ25) had documented piston ring issues causing oil to burn in combustion chambers without visible smoke or leaks at lower consumption rates.
Affected: Outback 2.5i (2013-2016), Forester 2.5i (2014-2016), Legacy 2.5i (2013-2016), Crosstrek (2013-2016). Subaru extended warranty coverage — we provide documentation for claims.
The EJ25 2.5L (used through the mid-2010s) can develop internal head gasket failure causing coolant to enter the combustion chamber. Symptoms: white exhaust smoke, sweet smell, coolant loss without external leak, possible oil/coolant mixing.
HC combustion test confirms internal head gasket failure. Repair $2,500-$4,500.
EJ engines over 150,000 miles may develop normal ring wear. Blue-grey smoke on startup or under acceleration, oil consumption 1+ quart per 1,000 miles. Compression and leak-down tests quantify severity.
We check oil level, document the mileage, and recheck at 1,200 miles. Consumption over 1 quart per 1,200 miles typically meets Subaru warranty criteria. We provide written documentation for dealer warranty submissions.
Buddy Rausch founded Tedious Auto Repair in Chico, CA in 2007. ASE Master Certified. 18+ years serving Butte County. About Buddy Rausch