Quote:
quote:Originally posted by JandC
Ran into a guy from Michigan this afternoon that had a 2012 F350 6.7 with over 50,000. He said he only puts an additive in every other tank and when he does his MPG doesn't change much. He said he gets 20-21 mpg highway.
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I can believe that. A real 5% milage increase is really exceptional for a fuel addative. Of course it all starts with the quallity of fuel you put into the tank. I've seen my milage vary by 1-2 mpg depending on where I get fuel. Around home I mostly get Shell Premium diesel. On the road, I get what's available.