Yes, it will decrease your fuel economy slightly.
Yes
43.28%
That depends on the vehicle you're driving. There'll be a significant difference between the mileage you'd get from a Prius and the mileage you'd get from a Heavy Goods Vehicle.
Up to 2 percent. http://www.fueleconomy.gov/feg/driveHabits.shtml
Based on the condition of the vehicle and the mileage on the vehicle, you can get a Chevrolet Corvette for as low a price as $100. However, you will most likely need to do maintenance on a cheaper priced vehicle.
100 kms
It will the same mileage of the new cluster you installed. mileage recorded on the cluster not on the ECU I'm sure about this 100% It will the same mileage of the new cluster you installed. mileage recorded on the cluster not on the ECU I'm sure about this 100% It will the same mileage of the new cluster you installed. mileage recorded on the cluster not on the ECU I'm sure about this 100%
The answer depends on what it is that you are trying to reduce. 49/100 cannot be reduced but 50/100 = 1/2.
There are far more resources than you need, so you can upgrade all items without struggling to gather 100% of the resources.
100
about 100 miles
There is no noticeable loss in mileage, certainly none in coolant of using a/c at 60% capacity versu 100% capacity. It depends on which car you have. Some just mix in hot air to make it warmer. Other's shut off the compressor after the internal temperature has reached a certain point. The second type can save you gas if you don't run the a/c at 100%.