What goes wrong
The piston rings used in early FB20 engines can fail to maintain sufficient oil control, allowing oil to bypass the rings and be consumed in the combustion chamber. This leads to reduced oil levels over time, requiring frequent top-offs to prevent damage. If left unaddressed, critically low oil levels can cause premature wear to bearings and other internal engine components.
Symptoms to watch for
- Excessive oil consumption (e.g., more than 1 quart per 1,200 miles)
- Blue smoke from the exhaust, especially during start-up or deceleration
- Illumination of the low oil pressure warning light
- Engine knocking or ticking noises (in severe cases of low oil)
- Reduced engine performance
Root cause
The primary root cause is poorly manufactured piston rings from the factory that do not provide adequate oil scraping and sealing. This allows engine oil to pass into the combustion chamber and burn off. Carbon buildup on the piston rings can also exacerbate the issue over time, further reducing their effectiveness.
Permanent fix
- Piston and piston ring replacement with updated parts
- Short block replacement (if damage is extensive)
Related recalls / TSBs
FAQ
What causes fb20 oil consumption?
The primary root cause is poorly manufactured piston rings from the factory that do not provide adequate oil scraping and sealing. This allows engine oil to pass into the combustion chamber and burn off. Carbon buildup on the piston rings can also exacerbate the issue over time, further reducing their effectiveness.
How much does it cost to fix?
National average $2,300–$3,800.
Is this a DIY repair?
Difficulty 1/5. Piston and piston ring replacement with updated parts
What are the symptoms?
Excessive oil consumption (e.g., more than 1 quart per 1,200 miles); Blue smoke from the exhaust, especially during start-up or deceleration; Illumination of the low oil pressure warning light; Engine knocking or ticking noises (in severe cases of low oil); Reduced engine performance