Quote:
Originally Posted by ksa8907
You'd be more likely to get 2-3 mpg by dropping down to lightweight aluminum 17/18" wheels.
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This is my vote. If you look at most modern hybrids, there's typically a standard and a touring trim. The difference is often 4-6mpg, and typically the single largest contributor to that is that the touring has larger, heavier wheels with a different compound.
Of course, do what you need to do for safety.