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Old Nov 13, 2013 | 08:59 AM
  #1  
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linleo1995
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linleo1995

2000 F-350 long bed, 7.3 diesel. 55mph and under, 21gpm. Over 65 mph, 15.5mpg. Any thoughts? Can I do something to improve highway mileage?
 
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Old Nov 13, 2013 | 09:09 AM
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From: Carhenge
Slow down.
 
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Old Nov 13, 2013 | 09:10 AM
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From: coquitlam,BC
Those #s look reasonable. Maybe a better intake but we are splitting hairs now. Your right foot is your best cure for better mpg.
 
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Old Nov 13, 2013 | 09:20 AM
  #4  
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21 gallons per minute at 55 seems high to me
 
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Old Nov 13, 2013 | 06:24 PM
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Originally Posted by Jmatthews
21 gallons per minute at 55 seems high to me
That's funny, but what it reads. 5.5 mpg seems high to me to lose, but there right, slow down is all you can do.
 
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Old Nov 13, 2013 | 06:28 PM
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Keep your RPM's under 2000 rpm. You will get better mileage. It's not fun to drive but it will improve your mileage.
 
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