A buddy of mine that doesn't post on here has had a 2016 XD Cummins since it was about a year old. A litany of issues, both engine and otherwise, with the truck. It "feels" powerful and can pull really well but he hates it and wants something older and more reliable (read, less emissions and electronics crap.) He is a Nissan fan through and through (and had an older gas Titan before this one). Given that the Cummins barely tows more than the 5.6L Endurance if you were to get one get the gasser it is proven very reliable (although as noted above, not terribly thrifty). That VK engine block design has a lot of years on it (officially dates to 2002 Q45, before the Titan came out in 2004, but heritage is the VH series prior to that.) NISMO raced the VK block so it is pretty indestructible.