Cost of LPG fuel LPG actually has a much lower
calorific value then petrol, so you will get less miles per gallon out of an LPG car, however in the UK LPG tax levels are much lower than both Diesel and Unleaded so it is still a far more cost effective way to run your car. The tax break is due to evidence that suggests that LPG is better for the environment than the mainstream fuels. This ...