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Old 09-20-2012, 11:32 PM   #11 (permalink)
Duffman
Master EcoModder
 
Join Date: Mar 2008
Location: Edmonton, AB, Canada
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I've been running it every second tank in my 6.0 powerstroke for a few years. Because I alternate it with anouther additive I cant really comment on any fuel efficiency gains but I feel the lubricity benefits are worth it, especially in winter.

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