hmm. but LPG prices track gasoline prices. So.. i guess that's 36/L gasoline, 23/L LPG. difference of 13 pesos per liter. Full tank 40L (1440 pesos * 220km = 6.5 pesos per kilometer gas, 920 pesos * 200km = 4.6 pesos per kilometer).

so if you drive 30km/day, that's 660km/month or 4300 pesos/month gas and 3000 pesos/month LPG. recovery period would then be roughly two years. still a long time.

but a cheaper solution than buying a fuel-efficient car if the only goal is to save fuel.