Based on your comments...uh no. I'm sure you have loads of links to oil sites (we all do) and you send your oil in for analysis (results apply to your truck only), so that makes you the armchair oil guy, right? All I'm saying is that for things like oil...it's very subjective. What applies for you and your truck does not go for everyone else. Try and qualify your statements rather than spew things like, "Nissan uses 5W-30 only because they don't want to send you on a wild goose chase looking for 0W-30". I'm sure that's exactly why they 5W-30 :rolleyes: