Putting two or three squirts of oil from an oil can in the cylinder before testing... Always test dry first, then wet...
The oil will fill the gaps between the pistons and rings and if the numbers increase with the oil in the cylinder, then the rings are most likely the culprit that needs to be replaced....
If the readings are the same or real close from wet to dry on the same cylinder, then look at the valve seats and seals for the leak....
