See also:

Cleaning the exhaust tail pipes
Impurities combined with the effects of road grit and corrosive environmental factors may cause flash rust to form on the surface. You can restore the original shine of the exhaust tail pipe b ...

Important notes on tire pressure
WARNING Should the tire pressure drop repeatedly:  - check the tire for foreign bodies.  - check whether the wheel is losing air or the valve is leaking.  - make sure that onl ...

Additives
Do not use any additives in the engine oil. This could damage the engine. ...