I purchased an '08 Titan the Friday after Thanksgiving. I traded in a Chevy Silverado. I used Amsoil fully synthetic oil in the Silverado (and my wife's 4Runner). Does anyone run a fully synthetic motor oil and if so, what kind? I would like to run Amsoil in my Titan since I paid to be a dealer to get the wholesale cost (overall, I save a few dollars). Thanks for any input.