They're not fill errors. The conditions were different - especially wind conditions. The best runs are on warmer days back from Calgary going to Edmonton. If you read the details of my fuel logs, you'll see lots of comments. Calgary is at 3300'. Edmonton is at 2200'. On a warm day in Calgary, wind is usually out of the south. Edmonton is north of Calgary.
If you don't believe me, lookup the historical weather conditions @ weather.gc.ca
:-)
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