To Panda 169 drivers: tire wear

Hello, my friend has had a Panda 169 for 2 years now. Except for the exhaust the 05 panda did not cause any major problems. Now I have to find out the following: – Summer tires (Conti Eco Contact) have lost at 6000km 3mm profile (front axle) – 2 new summer tires (Mayola Crono 480) lost at 6000km mileage 2mm It seems to me that this is quite a lot. After 3 years (about 24000km) the tires are finished. That can’t really be. So my question: – how does it look like with you d the wear of the tires in general – how were the Conti tires (including original equipment) in terms of wear – with which summer tires have you gained good experience regarding wear? Thank you