We just purchased a used 2004 Dodge Durango with the 4.7L V8. The vehicle has 10k miles on it, and has a service history with 5W-30 dino. I plan to use synthetic oil. I have three questions...#1 what oils commonly available besides Redline have a high ester content, and #2 if any of you owned it would you pour in some ARx treatment before the next oil change or would you just pour in a high % ester synthetic and let the oil clean the negligible (if any) deposits left w/ dino? Or #3 am I just splitting hairs and wasting my time thinking about this; just pour some oil in and drive it!