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Old Sep 9, 2009 | 12:40 PM
  #16  
megawatt00's Avatar
megawatt00
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From: Rochdale MA
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Different fuels from different suppliers will burn differently. IIRC Ron was getting his fuel from the same place. He filled up somewhere different and his MPG went up a little
 
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Old Sep 9, 2009 | 06:35 PM
  #17  
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From: Northern Idaho
Yea, I have to wonder that too. I filled up in Tacoma Washington and drove to Idaho and got 23.5 mpg but recently went from Northern Idaho to southern idaho and back and got about 19
 
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Old Sep 21, 2009 | 12:38 PM
  #18  
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Well I changed all the fluids, except coolant, (that will be another day) and have put three or four tanks of fuel through it. Took a road trip of about three hundred miles this weekend. Filling the tank up to throat each time I was able to get 20 miles to the gallon. Paper and Pen calculations. Not to shabby for a 3/4 ton truck. I will take those numbers. Haven't figured out in town milage. Hopefully better than what it was before. Plus I did the 6637 mod to. That migh of helped.
 
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Old Sep 21, 2009 | 03:29 PM
  #19  
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Yep, sounds good. What was your average speed and RPM?
 
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Old Sep 21, 2009 | 04:28 PM
  #20  
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I averaged around 75 mph some 70 mph. Average RPM was right around 2000 to 2100. Tried the whole keep it under 2000 RPM which put me at 67 MPH and that didn't last to long on the freeway. Just way to slow.
 
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