Make sure the vehicle is tuned correctly and tires are inflated according to the sticker in the drivers door. You can also install a cold air intake. It replaces the factor air filter assembly. Most new after market air filters are washable when dirty and never need replacing! The factory system is designed to be quiet and not always efficient. You can also install headers replacing your factory manifolds which are the cheapest way for the manufactures to build parts. Then install a cat Back exhaust system replacing your factory exhaust system. You can go up an eighth to half inch diameter on the exhaust pipe and go with a performance muffler. They have performance mufflers that are as quiet as a stock system or as loud as you want.
A cold air intake and cat back exhaust is a very popular upgrade these days, it allows your engine to breath better and you will get increased efficiency of your vehicle with an increase in set of the pants power as well as increase in fuel mileage of 1-3 miles per gallon.
Don't turn it on.
The maximum Thermal Efficiency of Petrol Engine or Gasoline Engine or Otto Cycle Engine is about 25-30%.
10kms/hr
an increase in the price of petrol will make the price of the car also increase.It will reduce the demand of the car and the demand and supply curve will shift to the left .The car and the petrol is compliment goods whereby it related to each other alike car cannot move without petrol and cannot play badmintion without a shuttle.
Depends on the fuel efficiency of your vehicle.
Yes
Depends on the fuel efficiency of your vehicle.
It depends on the cost of said petrol and the efficiency of the vehicle in "miles per unit of petrol". You didn't supply enough information.
A car that runs on fuel cells only has a similar overall efficiency to a car that runs on petrol because a car that runs on fuel cells is designed to not pollute the Earth but you need renewable energy resources to generate the electricity which is like the efficiency of the petrol pollution. That was what I put on my homework anywayz. :)
it will increase its performance
That depends on the size and efficiency of the car/engine.
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