A 1.6-liter turbo diesel T25 van's oil capacity isn't standardized. The exact amount depends on the specific year and model of the van.
You absolutely must consult your owner's manual. This manual will give you the precise oil capacity for your particular vehicle.
Trying to guess could lead to underfilling (damaging the engine) or overfilling (causing leaks and potentially damage). The owner's manual is the only reliable source of this information.
