You can't convert natural gas to propane because natural gas is methane and propane is what it says it is. Given that, there are Compressed Natural Gas cars, and if you get a natural gas compressor you can use it in a car.
Makes the car go forward!!
12
because your car has a gas leak
My car is out of fuel, which is why I am now headed toward the gas station.
No
In your owner's manual, check capacity of your car's tank. Fill it up completely full. Every time you need to refill your tank that week, record how many gallons you added. At the end of your week, fill your tank once more and add all the gallons you fueled together.
Miles divided by gallons of gas put in your car. I reset my odometer every time I fill up my car. That way, next time you would fill up your car, you take the miles that are on it and divide it by how many gallons of gas it takes to fill your car up.
Different heaters use different means to work. Some heating is electric and some is fueled by gas, like natural gas or propane.
Get out and look
No it cann't unless the hole is bloked.
No