BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)


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      11-19-2012, 05:39 AM   #1
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Mpg Change From Rft's To Nonrft's?

Many on these forums have changed from OEM run-flats to nonrun-flats. Michelin Pilot Sport A/S Plus appears to be a popular option to maintain sharp handling. Has anyone noted a fuel economy change in going from factory OEM RFTs (Goodyear NCT 5s in my case) to the Michelins? Better or worse?
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      11-19-2012, 09:08 AM   #2
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I only notice a drop in fuel econ when I install my winters, which are run flats. My summers are Michelin PS3s.
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      11-19-2012, 11:45 AM   #3
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Z4: RE 050 RFT to Goodyear F1 GS-D3 - No change
128i: Goodyear NCT5 RFT to Conti DWS - Very slight (2~3%) improvement

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