It lowers your mpg
Yes. with larger tires the odometer will show less mileage than actually travelled.
It could make it better, but nost likely make it worse.
Yes.
Maybe, the manufacturer optimized the tire size to the vehicle, if your currently running larger than stock tires then you could be decreasing your mileage. Check the inside of your drivers side door for a placard with the correct tire size and inflation.
yes but it will so mess up the mileage.
incorrect tire inflation
How it rides, handles, fuel mileage and power are affected.
No, you cannot replace 205/65R16 tires with 205/65R15 tires because they have different rim diameters. The "16" and "15" in the tire sizes indicate the diameter of the wheel in inches, and using a tire with a smaller diameter will not fit on a wheel designed for a larger one. Additionally, changing tire sizes can affect the vehicle's handling, speedometer accuracy, and overall safety.
If you put larger diameter tires on your car, the speedometer reading would be slower than the speed measured by a radar gun. This is because larger diameter tires cover more ground per revolution compared to smaller tires, so the speedometer would underreport the actual speed of the vehicle.
You can but it not a good swap. The 65 series tire will be 3.15% larger in overall diameter. It is never recommended to go over 3% difference. Your speedometer will read 58.1 at a true 60 mph. Performance and fuel mileage will be adversely effected.
27x1 1/4 bike tires and 700c tires differ in their diameter and compatibility. 27x1 1/4 tires have a smaller diameter and are not interchangeable with 700c tires, which are larger. It is important to ensure that the tire size matches the wheel size for proper fit and performance.
Tires do not have oxygen sensors. They can have pressure sensors. The lack of pressure sensors would have no affect on fuel economy.