Hey guys. I'm looking at buying my first Titan (coming from a F250). The 09 that I drove tonight (134k miles) seemed to seriously lack low end power. When accelerating from a stop, it was alot of noise and not much distance, if that makes any sense. When do the 5.6 Titan motors need "refreshing", or is this the way all Titans run? Any help or advice is more than appreciated...