On our flight home with our slightly used Top Cub a few weeks ago, we noticed some condensation on the oil dip stick in the morning pre-flight. Durring flight, the oil temp never went above 165. Aftere an oil change, and within 4 or 5 hours of flying, the next morning there are more water condesation drops on the dip stick. With oil temps still in the 165 range, my A&P says we need to get the oil temp up a bit higher to help burn off moisture. Is this right? If so, is the simplest way to block off some of the oil cooler area?