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I have two questions about my XF dual-fuel ute. I run the ute on LPG most of the time. I was wondering how often should I run a full tank of petrol? As an example, two tanks of gas to one of petrol. The LPG tank is 70 litres while the petrol is 60 litres. Does petrol spoil if it is left in the tank for too long without being used?

I would run it on petrol one tank in four. Regularly running petrol through the system keeps the rubbers and seals in your fuel system moist and able to do their job, letting them dry out can lead to leakage and other problems. To your other question. Yes, petrol can spoil when left to sit in the tank for a long time. Moisture can accumulate, it can become gummy and then clog up the system when you use it.

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