Even though the figures can be made to look like they stack up for the Petrol versus the Diesel, the reality is ( and no matter what price you paid for the 4wd ) that every week it costs you more out of your pocket to fuel a petrol..
Now, we know if you had bought a cheaper petrol in the 1st place, then that saving would have taken X amount of yrs to get even if you had bought a diesel.......BUT.....in the real world, you have bought and paid for the 4wd ( or paying it off ) and the fuel cost is coming out of your pocket every week..