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Tony,
As you've stated piston swelling due to heat under high load has been the primary cause of the scoring.
Do you see any evidence with your tear down that supports the concerns people have about fuel dilution caused by DI?
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'17 M3 Imola Red/Carbonstructure Cloth, Competition, Lighting, 6MT
Retired: '93 325i |'99 Jeep Wrangler Sport |'06 330i Sport |'08 335i Sport |'08 328i Sport |'09 335d Sport
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