Liked the thread, I guess that gas temp., will rise with radiator water circulation and hot gas burns better and completely so the mileage will increase and exhaust emission will reduce.I would like to see the CNG setup in New Corolla.
I had been working on Gas Turbines so there we used to have gas heaters and in winter we kept gas on 62 degree C as gas was going to freeze after pressure reducing station and it has worst effect in the Gas firing so heating CNG in the regulator section might have the same principle.
You can see Gas pressure control valve in Sui gas station along the road, you will see control valve body surrounded with ice especially in the winter like now.