*spyghost: are you referring to your glx lancer? A gas engine fed like yours do not need an exhaust clean up using water and alike. Have you noticed that gas fed exhaust system are more vulnerable to rust? (nadudurog at napuputol) compared to diesel fed na hindi kinakalawang? what more if you use water and solvents alike. ihataw mo lang once in a while a.k.a. italian tune maalis na at makaka hinga na siya ng maluwag. normal lang to have carbon deposits anyway don't worry.

For diesel fed yes you can use water and solvent / detergent but with exceptions too like those who have catalytic converters . mahal yun pag nasira!