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BMW Aluminum Cylinder Blocks



Is it true that BMW is manufacturing 2.5 liter engines with
aluminum sleeveless cylinder blocks? And that BMW engineers
are worried that high sulfur U.S. auto gas will cause
premature wear on these engines? And that a quiet recall of
the few vehicles already in the U.S. with such cylinder
blocks is currently occurring? What is the metallurgical
difference between what BMW is doing versus what Chevy did
with the Vega 25 years ago? Thanks.

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