There are tires intended for getting better mileage, particularly for hybrids. You won't find them in 1 sizes.
If anything, a non-runflat of the same category as a runflat will weigh less and on that basis give you marginally better mileage.
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135i, SGM, Coral, Sport Package, Auto, Premium Hifi, USB/ipod, Apex EC-7s, PPK Stage II
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