See also:

ON
This is the normal operating position after the engine is started. ...

Fuel
CAUTION Use of a fuel which is low in quality or use of an inappropriate fuel additive may cause engine damage. ...

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 ...