Wards Auto names the 10 best engines each year and before it does that it has to test a bunch of engines out. So Wards has tested out the Titan XD's 5.0L Cummins diesel V-8.
After taking it out in Arizona, off-road, hauling 800 lbs. of cargo and towing 9,000 lbs. on hilly freeways at 70 miles per hour, Wards described the engine as:
Nissan will not have to report fuel economy because of the classification of the Titan XD, but Wards observed fuel economy between 16 and 18 miles per gallon. When towing 9,000 lbs. through hilly terrain the fuel economy was measured at 9.6 mpg.supremely capable, allowing the Titan XD to go anywhere and do anything. There’s no mistaking this engine as anything but a diesel, especially at idle, but it quiets down on the highway.
Read the full article and watch the video here --> http://wardsauto.com/diesel/2016-wards-10-best-engines-test-drive-nissan-titan-xd