according to mapquest your looking at ~5k(3k miles)
before the lift with my lb (128L tank)I got 950km on a single tank, in the mountains hauling ass with 4.10's
with the 308's lets say you get 22mpg in the flats if you keep you speed below 115kmh,with a sb tank(98L)you will get ~950km per tank
so fill up just over 5 times @ $.90 per L ,~$90 per fill
I say your looking at ~$470
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