3rd Gen Engine and Drivetrain -> 2003-2007 5.9 liter Engine and drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

got 15mpg when new, now less..

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Old Apr 22, 2007 | 11:27 AM
  #1  
chumstone's Avatar
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got 15mpg when new, now less..

that was hauling my camper and towing a toyota wagon. I'm thinking that the injectors must not be working as new or something has changed. I was thinking of pouring a gallon of power service in it and seeing what happens. comments anyone? Thanks.
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Old Apr 22, 2007 | 12:11 PM
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Try a quart of power service and 8 oz of Marvel Mystery oil. I run that on every fill up.
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Old Apr 22, 2007 | 01:22 PM
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I used to run powerservice and marvel mystery oil at every fill up. I stopped wasting my time after one of my injectors went at 50k.
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Old Apr 22, 2007 | 08:04 PM
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if you havent changed your fuel filter, now would be a good time to do that

brett
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Old Apr 23, 2007 | 12:28 PM
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If you want to clean out your injectors pour in about 14-16 oz of Lucas in your tank. I did this to mine when I had an injector sticking/knocking and it cleared it up. I also used 12oz more this weekend on a short 381 mile trip and got very good 20 mpg with a 2,000 lb load and 15+ mph side wind for 80% of the trip.
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Old Apr 23, 2007 | 02:50 PM
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DBLR,

Lucas What?

Stealth
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