43.28%
Yes
To increase fuel mileage.
Most certainly. The amount they reduce mileage depends on how aerodynamic the one you are using is and the vehicle you are driving.
I'm not sure about 40% but it WILL reduce gas mileage I'm not sure about 40% but it will for sure reduce your gas mileage. 40% does extremely high for just one O2 sensor
Yes, it will decrease your fuel economy slightly.
77 percent
You would reduce it by £24.25 to leave £72.75
77 percent )
You would reduce it by 8.75 - giving you a new total of 26.25
Check to see if your computer has any codes stored.Many auto part stores will do this test for free. A faulty O2 sensor will reduce mileage. Also does the vehicle need a tune up? Old plugs and wires, and a dirt air filter will reduce mileage, as will under inflated tires. Lastly some blends of pump gas has higher levels of ethanol which can reduce mileage 5-15%.
These are maintenance items like changing motor oil, rotating wheels and tuneups. They should be done at recommended intervals to maximise vehicle performance and reduce wear.
It is not possible to reduce a percent to it's lowest terms. It is possible to reduce a fraction to it's lowest terms, however.