Well that is good to know. I remember when I had my old Durango's. I would put Sea Foam in the brake vacuum and it would clean carbon out of the engine. What do you think about this way of doing it? I am just trying to find the best, most efficient way to keep the top of the intake valves clean.

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2008 X5 3.0si
Monaco Blue/Grey
Tech Package
Cold Weather Package
Premium Package
Build Date: 02/2008