You must be new to this forum. One of the longest threads on this forum is about someone that drained Mobil 1 because it wouldn't work. Also the owner's manual doesn't recommend the use of synthetics in the Titan. I would certainly be concerned about the possiblity of the warranty being voided by useing synthetics. The link below is the beginning of the problems with synthetics.SoldOnNissan said:
http://www.titantalk.com/showthread.php?t=8932&highlight=mobile