Claims to clean valves in 30 seconds. Best intake valve cleaner made in GERMANY!!! mannol? we find out if this is the best fuel system cleaner or if there is a much better fuel additive. can we solve or fix a bad idle find out on this channel we fix engine vibrations or surging engine. with fuel cleaners you can clean intake valves on a gdi or direct injection engine like seafoam or marvel mystery oil.
Best intake valve cleaner MADE IN GERMANY!!!
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