I am curious if anyone else has noticed an exhaust odor from their truck? I keep mine in the same garage I have kept all my previous vehicles in but since I got my Titan I have noticed an amonia and sulfur smell in my garage whenever the truck is running. This is the largest engine of them all so it would stand to reason that there is more exhaust and therefore more odor, but my girlfriend has also complained several times now that when driving behind me in traffic she can smell my exhaust. I would expect that from a diesel but not a gasoline engine if it's in good health, furthermore, since she first compained I have tried to notice other titans and I can't say I have found one that smells like mine. Any thoughts from those of you who understand the inner workings of these newer engines?