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Fuel Type (Non Cat M3)

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  • Fuel Type (Non Cat M3)

    Does anyone know if the valve seats on an early Euro M3 (No Cat) are up to using unleaded fuel without mods ? I've been using an additive on and off since I got the car to be on the safe side but is this really necessary?

  • #2
    >>>Does anyone know if the valve seats on an early Euro M3 (No Cat) are up to using unleaded fuel without mods ? I've been using an additive on and off since I got the car to be on the safe side but is this really necessary?<<<

    You're fine with any year or model M3. The hard seats are pressed into the soft alloy head, and are indifferent to lead / no lead. The additive won't hurt anything so it is okay to continue to use if desired.

    Stan

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