Just replaced the radiator in my 93 K1500 Silverado. Drastically reduced the coolant leak, but still leaking a tiddy bit from somewhere else. The whole coolant system has been topped off with new coolant, should it feel oily? I am losing oil, but I suspect it's just being burned off. The coolant is obviously green and not cappuccino colored. What do you guys think? I'm going to add more info once I find the leak and such.