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| FM/DM threads Everything about FM/DM in CoD |
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#11
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According to AP1590B A.L. 4 (November 1940) the different sparking plugs are "very desirable" but not required. So using 100 octane with the regular sparking plugs seems to work, however it doesn't sound like a good idea. In addition it doesn't mean that the 100 octane plugs work satisfactory with 87 octane.
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