Not sure if anyone is interested, but I've always been a little curious, and every time the prices for RUC, 91 and Diesel change the old debate crops up about which one is better. Petrol has increased 3c this month, and RUC has risen (bit of debate that the RUC has risen more steeply) so the arguments come out again.
Anyway, I created an excel sheet (one table assuming you rego 6 monthly, one for 12 months) based on a year. 0-50k comparison of cars and van/truck/utility but all private (extra fees and shite with transport etc) and up to 6 tonnes.
You can fix the gas price and fuel consumption (only the top 2, $ and L/100km) and RUC rate and this will fill in the table for you. I've always hankered for an F250 style ute, 8 foot tray for motorcycles gate up, and still cab space, but this table shows if you're going that big, stay away from petrol because petrol tax plus RUC (they're over 3.5t so classified as heavy) makes it more expensive after minimal distance. However, fuel consumption and gas v diesel price makes a big difference in which option costs more.
Obviously I'm not factoring in servicing and other running costs...
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