One of my spark plugs oil ???

Hello...
I have a Mitsubishi Lancer Gl 1.3 Station Wagon, Carburado, Mod 93, already a month ago and 1/2 was ringed because oil was passing oil in one of the spark plugs; At that time I made a long trip and arriving at my destiny I felt that my car lost strength, after reviewing it I found a wet spark plug again, so I decided to do compression tests and in Efcto it was very good 125 all. I proceeded by installing an increase and with he has worked well.
My question is that it could have happened and what consequences can bring if I still handle my car like this.
I appreciate it in advance ...