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Originally Posted by StormyKnight
@BruceT, I asked a similar question of our 4WD group since they were adding engine analysers to thier cars, one of the screens shows current fuel consumption. It worked out that it was around 2l/hr more @ idle with the AC on.
I'm sure there is a margin on the DTE calculations, but that is running it close!
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I'm sure the A/C fuel consumption varies a lot depending on how you use it.
And on DTE, the 2nd one was a shock as I thought after the first effort that a DTE of zero meant 1.5 - 2 litres left.
I'm confident you can run DTE to zero, but you better have a petrol station nearby when you do! It also gets a little unstable with around 80 km left (when the refil light comes on). For awhile it drops too slowly, making you overconfident, the somewhere around 20-25 km it starts to drop rapidly. All of a sudden at 12 km it went to zero!