Based on over 400,000 miles of rubber band drive scooters-----a good one should last over 100,000 miles with nice care. In N America I use WalMart house brand oil 10-40----stay away from dealers except for warranty work, use OEM drive belts.
On 11th Maxiscooter since 1990, XTown 300i ABS----at 9,000 miles or so, no trouble or warranty claims. Don't worry, just ride and take care of the bike.
Note: I trade at about 50,000 miles as I like new bikes/scooters and like riding on warranty