I changed my winter tires 10 April because I noticed the fuel economy dip from 7.5l per 100km to 8.2l per 100km. In Europe you want a lower number. I put on all-season because I am driving less now and the cost of swapping summer to winter tires and visa versa is an unneeded expense. The all-season tires got 6.85l per 100km. So the moral of the story is if you have winter tires change them as soon as safely possible or you will get bad fuel economy and very fast tread wear. I hope this helps
Winter tires use a special compound that remains pliable during winter months. If you're riding around on winter tires and it's 20 degrees Celsius outside, the rubber compound in the tread is creating excessive rolling friction, noticeably decreasing your fuel economy. Likewise, if you're riding around on summer tires and it's -4 Celsius outside, the rubber compound in the tread will be too hard to grip the road sufficiently and you can easily slide. My Mustang has all-season tires, and so does my truck. When it comes time to replace my truck tires, I may do back to Kelly All-Terrain tires. My old Ranger had them and I live on a gravel driveway.
So the moral of the story is if you have winter tires change them as soon as safely possible or you will get bad fuel economy and very fast tread wear.
Fuel economy mainly drops with low temperatures, not due tyres unless you have high friction ones.
6.85l per 100km
Do you have an old thirsty engine, live in hills, drive fast, do a lot of city driving, ...?
On a long trip I get around 5l/100km and still have winter tyres on. It increases to about 6.5 when driving hills. I get similar consumption with summer tyres too.
