Originally Posted by autonoz
I am getting ready to attempt to change my plugs and want to know, if after removing the plugs, are you worried about the penetrating oil going into the cylinder?
It really depends on the type of fluid used. The one I used was flammable, so I really had no concerns- I also check to see the evaporation time (sprayed some in a cup), where others are combustible, meaning they don't burn easily (like kerosene as compared to gasoline).
There are a couple of options if you use a combustible product....after all the plugs are removed, spin the engine over with the starter to clear the cylinders out.
Either way, I would highly recommend an oil change after initial startup just to ensure there is no residual contamination in the oil pan.