I just bought 2003 harley truck with 70000 miles on it,and I am wondering what kind of oil I need to use in it,cant find any info from the previous owner.also does the motor oil lubricate the blower?..and since I am asking all the new owner questions,is there anything I need to check on or keep a eye on since this truck has so many miles on it...I love this truck and I would hate to see anything happen to it..I ll be joining the club soon..Thanks for the help ,anyone else here in Oklahoma city