If its a viable option or not will depend on how many kms you do. Yes, you will use more gas per 100kms, but gas is half the price of petrol or cheaper. In my gas car I would usually get 15 to 16 litres per 100 kms, in a mixture of mainly highway and some city driving. Driving the same type of roads in my new petrol car is getting 11 per 100 (company decided petrol was the go) this is basically costing (based on the service station down the road from me) $16 per 100 for petrol, or $10.24 per 100 for gas. keep in mind that if you do 20000kms per year then having it on gas will save approx $1100 per year (remember, this is just an estimate) Depending on how much the gas system costs, how much you drive your car, and how long you are willing to wait for an investment to pay itself off should make the decision easy.
Ash
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