No, I use PULP all the time. If you look at the fuel door, there is a label that says "95 unleaded only". So nothing below 95 for my car. Also, is the journey between Gold Coast and Brisbane a 100% highway at 110km/h? If so, that is poor fuel consumption. I get 7.0L/100km on the highway with 98 octane premium. That translates to a saving of 0.95 litres per 100km. which is a savings of about $7.60 per full tank.

If I were to use regular, I'd save $0.10 per litre, which is $6.50 a full tank. So in the long run, I will end up paying $1.10 per tank more as well as causing the engine to retard timing, thus reducing the power output.