Hi guys, I am the owner of the 98 explorer that is on the message board. I had my friend post it because I had not registered yet, and could not post it my self. I would appreciate you expert opinions about switching from dino oil, and if I do, what is your recommendation to which oil I should use. I do not make the same money that my friend does, however I already use havoline 10w-30 synthetic in my wifes 98 ford explorer but I am considering switching back because I had some raddling between oil changes upon startup, so I changed the oil and added a bottle of CD-2 and it has not made the noise since. If you could advise me, I would appreciate any and all of your comments.