one simple test for purity :- two drops of petrol when put on a filter paper should evaporate without leaving a patch or stain.
The safest and easiest way to check petrol purity is the filter paper test. Take a piece of filter paper and drop a small bit of petrol on it. If it evaporates in a short amount of time and doesn't leave a line or mark behind it is good quality.
Reference to bad quality petrol sometimes causing the vehicle to randomly "jerk/jump forward like a kangaroo".
None. It is not the purpose of a petrol pump to check vehicles.
check plugs and fuel pump
An assessment of the location, supply, and quality of the oil below the surface.
The amount of energy will vary depending on the quality of the petrol but a good estimate is 32MJ per litre. So that's 32kJ in 1ml.
by compression test
If you mean the smoke it's usually related to the quality of petrol
You can add octane booster to it. They sell it at automotive parts stores and the mix ratio is on the bottle
average vehical checked per month
Premium quality petrol fuel is usually a higher quality of fuel which burns more efficiently. It may also have additives which help keep the engine clean and improve cold-temperature performance.
under the bonnet on the engine