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Normal for new tires to be especially inefficient at first. Normal for winter tires to be less efficient than all-seasons.
There are no solutions; only trade-offs. Increase winter safety at the expense of economy.
As an aside, that might be the main reason why I struggle to get EPA economy on the Mazda. I choose a tire that performs well in winter conditions, but isn't quite a dedicated winter tire to run year-round. I don't pay for gas, and I occasionally drive in Montana in January, so I prioritized safety in winter conditions.
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