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01-05-1999, 11:39 AM
I've heard two different stories about using this product. One is NOT to use it at all and the other is to use it every 5000 or 10000 miles as part of regular maintenance to keep the back of valves clean as well as fuel injectors. Over in the E39 section there is a debate going on about fuel additives in-general--a dry-gas treatment in winter and occassional use of Techron. What's your thought or experience on this topic(s).<p>Steve<br>98 E36

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