I calculated the avrg of my woo racer!
I fill 100rs' CNG.
Push the meter to 0
When fuel's 'R' light lit, I check the millage and usually I get 32-33 something. lol
CNG= 45.50/kg (now is 50/kg)
then in 90rs=2kg CNG (now in 100)
33 - 3=30
So it's 15kms/kg CNG!
Driving conditions are;
very bad, as I have to chang gear several times, harsh break, traffic jam.....etc!!!
Car is 15 yrs old+very heavy body+1500cc!!!
Same method I use to calculate it on highways!