Fuel filter change frequency

[RClark]

The manual and the tic call for a complete filter change at 15000 miles. Would there be any advantage in replacing the chassis filter at 10000 miles and both at 20000 miles? Other than cost savings .

 

[Newsa]

Interesting that my dash info screen will be calling for a fuel filter change at 10,000 ish. I have 6000 miles on this filter set amd only 38% life remaining (all according to info screen). But i might stretch it to 11,000 or 12,000 because the manual says every 15,000. Info center isn't the final say. Manual is the final say

 

[Newsa]

The manual and the tic call for a complete filter change at 15000 miles. Would there be any advantage in replacing the chassis filter at 10000 miles and both at 20000 miles? Other than cost savings .

If you didn't have to worry about warranty coverage, your suggestion makes sense. My front engine compartment fuel filter always looks like it has alot of life left on it when i change it. But those who've cut upon the chassis filter know it does the bulk of the filtering and water separating.

 

[jhenderson]

No advantage I know of to an early filter change. If the EVIC is calling for an early change it may be because of fuel usage. If you tow a lot you use more fuel. If the computer keeps track of approximate fuel used ( and I'm not sure it does) it would make sense to need a filter change based on gallons consumed rather than mileage alone.

 

[Bob4x4]

I have been told engine hours has been added into the formula.There is always small print in the owners manual..........info subject to change

 

[Mingoglia]

I've never heard of anyone being denied service ever for a dirty fuel filter with an exception for the idiots that NEVER change it, and have an injector pump fail. If you decide to go 20k on occasion I wouldn't think twice. I'd aim for 15k, but if say you're at 14k and going on a coast to coast and back trip I wouldn't change it before leaving... particularly if you follow the "rule" of getting fuel at high volume stations. I doubt there's a single person on here that "knows someone" who was denied a warranty repair due to a dirty fuel filter, again excluding guys who don't know better and try to go 80k miles.

Mike

 

[Newsa]

My EVIC only shows one idle hour (although that's not accurate). And I only towed 300 miles on this set of filters

 

[RClark]

My point was to change the rear filter more often . I know it gets dirty sooner and with most states or stations selling biodieseldirt could come quicker. Amazon's thereat filter for about $56.

 

[jhenderson]

Understood. The engine mounted filter always looks better on my 15 than it did on my 04. But remember a filter is always most efficient just before it plugs. The primary/ water separator will catch more crud when it's dirty than when it's clean.

 

[gsbrockman]

Even though I'm out of warranty (148k miles) I still stick by the 15k interval (or less) for both filters using MOPAR, Fleetguard, or Parker/RACOR. My lifetime average miles per gallon per fuelly is 13.6 mpg. 15,000 mile interval/13.6 average miles per gallon = 1,103 gallons of diesel filtered (a little over (20) 55 gallon drums of fuel filtered). I've dissected my rear separator quite a few times, and I'm confident they're doing their job as designed. I do not see any loss in performance at these intervals. RAM / Cummins really stepped up in fuel filtration on the 2013 & newer CTD HD pickups.

https://www.turbodieselregister.com...tomy-of-a-MOPAR-Fuel-Separator-p-n-68197867AA
#ad

 

[jhenderson]

That's just about how often I change on my off road tank and equipment. I change filters every 1,000 gals.

 

[DGamelin]

I change them both every 20k. I did that on my 04 for 250k miles and never had a problem and that one had only one filter.

 

[BaldwinScott]

Does the engine computer start to reduce power/performance when the fuel filters are needing to be changed? I remember reading posts here about this or something else that causes this to happen. Anyone here clarify this point/issue for me?

 

[Newsa]

But remember a filter is always most efficient just before it plugs. The primary/ water separator will catch more crud when it's dirty than when it's clean.

Is the filter (either one) also more efficient as a water separator just before it plugs?

 

[Cummins12V98]

Right on 15K for my change indicator.

 

[jhenderson]

fat fingered double post.

 

[jhenderson]

Only the rear is a water separator. If you do your job and drain it regularly it'll never be full.

 

[Bob4x4]

Does the engine computer start to reduce power/performance when the fuel filters are needing to be changed? I remember reading posts here about this or something else that causes this to happen. Anyone here clarify this point/issue for me?

No it does not derate for the filter being due.

 

[Newsa]

Going to drain my rear/chassis filter this afternoon. I saw a YouTube video where the guy said he knows he needs to drain his front filter if the truck cranks and cranks, but refuses to start. Curious to know when the "water in fuel" light comes on? Never seen that. Is that the sender in the rear water separator? Apparently the guy in the video had a third gen. So he didn't have a rear water separator and was draining the water from his filter in the engine compartment

 

[Bob4x4]

Both filters have wif sensors,they are referenced as wif1 (front) or wif 2 (rear)The light comes on when the resistance changes