There is an outer coat on all new tyres. This reduces the grip and performance of tyres. Thus, explains why you have low mileage on new tyres. You need to drive for approx 300km to run in your new tyres. Grip, handling, mileage and etc will improve after that. Correct air pressure is important too.

I always go to a petrol station to reduce air after changing tires. No jokes... almost all tyre shop will over inflate for no reason.

Different tires do affect fuel consumption because it also affect driving style.

Majority of tyres sold in Malaysia has a maximum pressure rating of 51 psi .
Hence most are them are recommended by tyre manufacturers for operating pressures as high as 44 psi and speed as high as 220 km/hr .
Generally tyres are over-spec'ed for day to day use .
IMHO, over-inflate from vehicle OEM recommended 29/32 psi to 40-44 psi say, is well and good within spec but over-pressure up to pressures higher than 51 psi is NOT .

This post has been edited by zeng: Sep 12 2020, 08:21 PM