Last weekend I went to visit my parents, and the bad visibility made the whole 1 lane highway going pretty slow, I'm taking between 70-90 KM/H most of the time. I had to drive in 4th gear often too as my car just bogs in 5th at 2000 rpm (a bogging car with AWD will shake the entire car).
I drove like that for 135 KM and I had just tanked before the trip, and tanked at my "pit stop", and re-filled it...to my suprised I had reached 32 MPG...! That's 5 MPG over my EPA rating for highway (it's in my gaslog). It suprised me as we're still using oxygenated fuel and it was around -5 celcius if I recall.
That really struck me as how speed affect mileage...specialy my car which wants to build boost as the rpm gets higher..!
I know some of you got scangauges, what's the average optimal speed that you get the highest MPG..and at what speed you get the EPA rated MPG.?
-thanks
Rayme 
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