700km for 75 litres = 10.7l/100km. Cost to refill = 75 litres @ $1.20 = $90
This means $90 buys 700km on diesel only
Running the system on diesel/gas and still using 75l of diesel plus 28l of LPG the Defender now consistently returns just over 1000kms an increase of 300km on diesel only scenario.
To cover the additional 300km on diesel only would cost:
300km @ 10.7l/100km = 32.10 litres required
32.10 litres @ $1.20 = $38.52
Therefore to cover 1000kms on diesel only the cost would be: 700km @ $90.00 + 300km @ $38.52 = $128.52
To cover the same distance (1000kms) with diesel/gas the cost would be:
75l diesel @ $1.20 = $90.00 + 28l LPG @ $0.55 = $15.40 So diesel + LPG = $105.40
So, the nett saving per tank would be $128.52 - $105.40 = $23.12 or 18% per tank.
This saving doesn’t take into account the extra power (the dyno showed 34% at this setting) giving you better drivability. Not to mention quieter, cleaner and with less wear on the engine!