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#1
10-24-2003, 05:09 AM
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745i - M102 - fuel type?
Hi there
A good friend has a 635csi with an almost brandnew M102 (3.2 turbo 252 HP) - engine. We can't really find any data on which type of fuel it needs.. The engine is euro-spec, and we can choose from 92, 95 and 98 octane, with and without lead-subsitute additives. Any ideas? Rgds, Lars Vestman, Denmark. 
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#2
10-24-2003, 10:33 AM
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lead or no lead
the m102 has a waste gate with maximum 12 psi boost.
So use 98 octane to prevent the knock detector from shutting off the boost. Later,
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#4
10-24-2003, 01:55 PM
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no leaded fuel in USA
there has been no leaded fuel in the USA since 1979.
I have a 1977 m10 built for lead and it is now over 500k miles and it is just fine. No big deal as to leaded or not.
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