See also:

CHECK ENGINE warning light/Malfunction indicator lamp
If the CHECK ENGINE light illuminates while you are driving, have your vehicle checked/repaired by your SUBARU dealer as soon as possible. Continued vehicle operation without having the emission ...

Engine exhaust gas (carbon monoxide)
WARNING ● Never inhale engine exhaust gas. Engine exhaust gas contains carbon monoxide, a colorless and odorless gas which is dangerous, or even lethal, if inhaled. ● Always properly m ...

Recommended grade and viscosity
CAUTION Use only engine oil with the recommended grade and viscosity. NOTE Engine oil viscosity (thickness) affects fuel economy. Oils of lower viscosity provide better fuel economy. However, in ...