Its amazing how much our fuel consumption seems to vary at times. On our drive home from jambo last year, via Alice Springs etc, we had one tank where we were on 18 and another where we were on 14.5. Generally, we seem to average around 15.5, but tuck yourself in behind a truck on the freeway and watch the fuel consumption drop. Because there's no gear change over 100kms/hr, I'm just always surprised by how quickly the revs go up. Sitting on 100kms/hr seems to have me right on 2000rpm, but at 110 the revs seem to go up a fair bit.
At the end of the day, you're probably only paying an extra $5 per tank doing the extra speed, so if it doesn't worry you then there's no problem.
As our tyres are an inch bigger than standard (and ATs), this would also probably effect our fuel consumption in a negative way. However, our van is a bit lighter than yours, at around 1300kgs
Now just get yourself the 110 litre aux tank that goes in the stock wheel well and you'll be able to go all day.
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'03 Intense Blue TJ: 33" claws 3.5" RE lift
'14 WK2: offroad pack
Previously, XH and XJ
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