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  1. Dp59

    Marvel Mystery oil in a 2004 5.0 engine

    Has anyone used Marvel Mystery Oil in the 5.0 engine? If so did you see a deference in engine performance when added to the gas tank?
  2. Dp59

    Adding second battery

    I want to add a second battery, not connected, just to have as a spare. Can i place it on the opposite side on the motor to keep better weight balance at the back of the boat or does it really matter?
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