Weird. They should just ban it altogether. Fuel consumption has a lot more to do with the technology than the size of the engine.
My old 1000cc alto never gave anything above 120 while my city gives 140.
No problem running my two 1300 & 1500 on petrol, i'd love to see the impact on the oil import bill. I would also love to see how PSO handles excess oil import since its almost always out of cash and begging the govt for money due to circular debt.
So any ideas where would they divert this 0.5% of total gas consumption ?
Hopeless.