salamz... i hav a coure cng .. wanted to ask that for washing the engine wht things should be covered and iz it neccesary to put oil after washing the engine..
secondly should i blow some air on the airfilter if it has become dirty cauz some one here said this should not be done..
and does washing the ac grill at the service stations harmz any thing or not .. after washing iz the ac perfomance good ?