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2007 Cayman S Fuel Range Decrease

2K views 9 replies 10 participants last post by  addicted2wasabi 
My 981 does the same thing. It seems to estimate my full tank mileage based on the average it was seeing before I fill up. I get a higher number if I had been doing mostly highway driving with better fuel economy prior to filling up than I will if canyon carving at high RPM.

I haven't checked to see if resetting all of the current values stored in the system back to zero changes anything, but its not really that important to me as I dont pay much attention to those estimates anyway. Way too many variables the way I use my car from one fillup to the next
 
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