Yes.
Yes, in fact, rotating and replacing tires regularly is essential for maintaining your car's optimum gas mileage.
Yes, the tires will ruin your gas mileage overall. Bigger tires weigh more and they're harder to rotate on the vehicle even though they gain greater traction.
Keep them properly inflated and balanced.
incorrect tire inflation
no
No
It lowers your mpg
I do oil changes and to make sure all tires are the the right pressure, if tires arent right pressure you lose gas mileage and regular oil changes and rad flushes.
No, I don't think they would negatively effect your gas milage. You just need to make sure that you keep them with plenty of air. That is what would negatively effect your gas mileage.
You will get the best gas mileage if you get the tires that fit your car that have the least rolling resistance. Rolling resistance is the amount of force needed to keep an object rolling at a constant speed. Heavier tires and those with deeper treads are less efficient. Remember to properly inflate your tires too.
If it is malfunctioning it can affect fuel mileage.