my 540 started smoking white the other day when i started it up. i was told it could be head gasket and to take the spark plugs out to see what the compression was. upon doing that i found that in each side there was a lot of oil. it seemed as though the oil was sitting in the compartment above the spark plugs and so when i took them out they were totally oily. i was wondering if anyone had any idea how this oil could have go in both sides. valve gasket? and what my original problem is because the smoke is white so i wouldn't think it has to do with oil.