Oil changes must be every 10,000 km (6,000 miles) or less. Not 15k. Not 20k. Use 5W-30 C3 low-SAPS oil. Look for receipts.
This is the Achilles’ heel of the V9X. The engine uses a to connect the crankshaft sprocket to the oil pump. In a percentage of engines (estimates range from 5-15% of early models, 2010-2013), this drive strips its teeth. nissan v9x engine reliability
Though less frequent than in smaller engines, turbo issues such as failing actuators or "shushing" noises can occur, often requiring expensive replacements. Oil changes must be every 10,000 km (6,000 miles) or less
The V9X responds incredibly well to tuning. A Stage 1 remap (no hardware) takes you from 238 hp to ~290 hp and 550 Nm to ~680 Nm. However, with tuning comes caution. Use 5W-30 C3 low-SAPS oil
The factory intercoolers are prone to splitting under boost pressure, leading to a loss of power and "limp mode" issues.