Well there is hope. Got a running start on a new tank. Filled up with a warmed up car, went about 15 kms. Then another 60 kms today from a cold start. I'm sure by the end of the tank it'll have climbed a lot, but at least I don't think there's a mechanical problem, just driving conditions. This is with 15" X-ice, secondary highway driving, fairly level terrain, 2~4C ambient temp, 80 kmh max. It was dancing between 3.7~3.8, translates to 62~63 mpg US. Displayed of course, so maybe 7.5 % less in reality.
I was looking at my Fuelly icon a few days back, noticed it was at 4.9, wondering. Yup, it's dropped back to 4.9 liter/100km. Only took 4+ years, from when I installed the *%#@ Michelin Primacies... That translates to 48 mpg US (235.2/4.9)
Just convince yourself 5 liters is a gallon and run with that with a smile. It’s the thing to do now to dismiss reality. As long as you believe it, it isn’t a …