Automobiles and Transportation : So what kind of technology changes the gallons per mileage on a car?

So what kind of technology changes the gallons per mileage on a car?

What if someone made an application on their phone that could change whatever they wanted on someone's car? And they do this at will in order to terrorize that person? Just not mike's per gallon on a car, just about anything else they could manipulate.


Just wondering about Tiger Woods accident and if there was foul play such as that.
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