i think it is mate..bore wash normally causes it
thats why im thinking this is my prob..it normally pushes the oil out of everywhere it can..my bottom end never used to breath well before but now i seem to have melted the plastic top on my dipstick..probs the hot fuel/oil vapour rotting it away with the crank case pressure..looks like it may be squirting vapours out of my oil fller cap as well..as there seems to be some oilly residue and dust stuck all round it
i think i may be ok if i get it mapped ASAP and run some thicker oil
thats what you should do for time being mate..thicker oil helps cars with worn rings