Hi Eugened, Most PDI procedures used by dealers require a minimum 20 km roadtest to ensure everything works well and especially to verify auto trans fluid level, (must be hot to measure). Consider the fact that Asian imports must drive from the plant to the staging lot, (where carriers take them to the port), then onto the ship, then off in BC to another staging lot, then to the railcar, then to another staging lot in Central Canada, then to a road carrier, then to the dealer. Domestic built units only miss the trip to the ship and off. Most car makers limit the overall mileage to 150 to 200 before a car can no longer be considered new and must be registered as a demo. The down side to demos is that the warranty clock starts ticking the day the unit is registered as a demo and if you buy it you can't get those days back.
Demanding a unit with under 30 kms may be asking too much, anything under 100 is OK.