See also:

Key lock-in prevention function
This function prevents the doors from being locked with the key still in the ignition switch. ...

Checking the coolant level
Never attempt to remove the radiator cap until the engine has been shut off and has cooled down completely. Since the coolant is under pressure, you may suffer serious burns from a spray of boilin ...

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 ...