a few questions on the 1000 mile service. would it be wise to let the selling dealer do it so I would have it recorded for any warranty problems later? Also I plan to change lubes myself. Which lead to my other questions. Owners manual recommends HD 10w40 or 20w50 depending on temps rode in for the engine,recommends HD formula + for trans and chaincase. Dealer says to use screaming eagle 20w50 in all three cases. I have read all the oil threads ansd have been a mechanic for over 30 years and I did a double take when they said this. Plan on changing lubes this week. What should I use for engine,trans and chaincase? This is a great forum.