See also:

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

Ruts and gravel roads
Observe the following rules when driving along ruts in off-road terrain or on roads with loose gravel: Check that the ruts are not too deep and that your vehicle has sufficient clearance. O ...

Problems with fuel and the fuel tank
Problem Possible causes/consequences and Solutions Fuel is leaking from the vehicle. Risk of explosion or fireThe fuel line or the fuel tank is defective. Turn the ...