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Old 10-04-2014, 06:45 PM   #1
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Fuel Filters

I have a DP with a C-7 engine. How often are people actually changing both fuel filters? I have been changing both out once every 2 years which in miles comes out to approx. 10,000-12,000 miles. I do know that trucking companies go a lot longer than that. Just wondering if I am changing out too soon. Thanks in advance for any feed back.
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Old 10-04-2014, 07:20 PM   #2
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Change both at 10,000 miles or 12 month or 1,000 gallon fuel which ever comes first.
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Old 10-04-2014, 07:26 PM   #3
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Quote:
Originally Posted by wb7auk View Post
Change both at 10,000 miles or 12 month or 1,000 gallon fuel which ever come first.
Best to insure no problems IMO.
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Old 10-04-2014, 07:31 PM   #4
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I might add be sure filters meet Cat spec's on micron rating.
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Old 10-04-2014, 07:50 PM   #5
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I change both every year.
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Old 10-04-2014, 11:09 PM   #6
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X2 on the change both every year. I believe that's the Cat recommendation.

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Old 10-04-2014, 11:46 PM   #7
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I change both my fuel filters every year.
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Old 10-05-2014, 08:59 AM   #8
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Depends on whether or not you put biodiesel in the tank, how full you keep the tank when it sits and for how long, whether or not you use a fuel treatment before storage. When you get a fuel restriction warning, then you know for sure it is time to change. Mileage for RV usage is probably a non-issue.
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Old 10-05-2014, 05:43 PM   #9
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I change the primary every spring. Not sure the secondary (engine side) filter needs to be changed that often - the primary does most all the work, including water removal.

I've been running my genset fuel filter 2-3 years, depending on usage.
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Old 10-05-2014, 05:59 PM   #10
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My primary filter costs ~$30; my secondary costs ~$20 and that's for a CAT filter. For $50/year I'm quite willing to replace them both every year. My typical 10-12,000 mile year costs me $5-6,000 in fuel. IMHO trying to save a few dollars on a fuel filter is false economy.
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