Have to agree with this. Only thing to keep in mind is if there is a problem developing, when it finally goes (what-ever it may be) what other damage will it cause. Its all down to your judgement, although why are you doing a test if nothing is wrong?Unless you are having a real lack of power, or burning oil... personally I would leave it.
sounds like your increasing the power a bit, what kind of increase are you going for? having a weak cyl-6 can cause problems if youre going for big power. if you are planning on opening up the engine, it may be a good idea to see whats causing the loss of compression. if the valves arent closing right, look at the springs, shims, and such.I`ve had some oil coming out of the air-filters, and I am installing power fc d-jetro, bigger injectors etc.. Just wanted to check if everything was ok before mapping it... No smoke or sounds from engine.. Think I`ll just get an oil catch tank and map it.. Then start saving for a brand new engine