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Discussion Starter #1
The brand new 2004 GMC Sierra Duramax/Allison will be in
the driveway within the next 4 hours. From what I've
been reading, the OEM fuel filter is insufficient, so
either an aux fuel filtering system or replacement
filtering system is in order. I live in northern
Illinois, which isn't too bad in the winter, but it does
get down around 0 degrees at times.

I've been looking at the Nicktane filter, and it seems
like a high quality filter. But I've also been looking
at filter systems by Dahl, which seem to provide water
separation. So I've got some questions... Does the OEM
fuel filter provide water separation? It appears that
the Nicktane fuel filter does not provide water
separation-- is that correct? What are your opinions/
experiences in regard to water separation?

I'm also interested in "Filter Minder" products-- are
they worth it? It is my understanding that they must
be placed on the suction side (before the fuel pump).
My new GMC has the OEM filter after the fuel pump,
meaning that to use the filter minder on an aux filter,
I'd have to mount it BEFORE the fuel pump, thus BEFORE
the OEM fuel filter. However, it seems more practical
to have the OEM filter first in line (catching the larger
particles), followed by the aux fuel filter AFTERWARDS
(catching the remaining smaller particles). Thoughts on
all of this?

Our truck does have an engine block heater. I've also
read that additives can be used to help prevent fuel
gelling. Also, there are fuel heaters. You thoughts/
comments on these items/methods?

Thanks!
Paul.
 

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The OEM fuel filter does provide water separation capability. The Nictane CAT filter doesn't provide water separation but will improve the OEM filter's ability to separate water. The reason, as I understand it, is the OEM filter (all these filter types?) water separation effectiveness requires a clean filter media. Since the CAT will be doing it job, the OEM water separation will be able to do it's job better.


Sorry, I'm not familiar with the other filters.
 

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Paul,


first off, welcome to the forum. I understand your eagerness with your new truck. i was so anxious to get mine i could barely stand it!


Ray403Dmax is correct, my kit does not have a water seperator. Your OEM filter does. Oddly enough, filter minder contacted me today and i am working with them on a drop-in addon for my kit. so yes you will be able to run a filter minder, and it will be positioned directly after the cat filter. you will even be able to see it too



The best thing you can do for the water, irrespective of secondary filtration, is to run a good fuel additive like Primrose 405 in the summer and Primrose 409 in the winter. more info on the primrose 405 can be found here:


http://www.nicktane.com/primrose405.htm


and more info on the 409 can be found here:http://www.nicktane.com/primrose409.htm


they are both very concentrated (1 12oz bottle treats 160 gallons) and can be purchased through George Morrison at www.avlube.com.


Nick
 

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Discussion Starter #4
Ray/Nick: Thanks for the responses. I plan to keep this
truck for as long as possible (500,000+ miles?), so I
want to do everything I can to promote that achievement.

Nick: I'm glad to hear about your talks with Filter Minder.
Can the Nicktane filter be added AFTER the OEM filter?
That is what I was thinking of having my mechanic do.
Once the kit is installed, is it particularly easier to
access/change the filter if it is either pre or post OEM?
Or does this not make a difference? I guess the same
question applies to view-ability of a Filter Minder.
Another question: Will having TWO fuel filters have any
adverse effect on the accuracy of the Filter minder (or
Filter MinderS-- if two were used?)

I checked out the links on Primrose. Seems like a high
quality product, but... isn't there a better way to deal
with water (and the other issues) than having to mix
an additive with the fuel? It's not a HUGE deal, but
it just seems a bit ackward.

Is there a number I can call with more questions about
Nicktane (or to order)? BTW: My truck is Summit White
also, crewcab/shortbox. Just had a Line-X bedliner put
in, and the nerf bars and tonneau cover are coming soon.
Any suggestions on brands of nerf bars?

Thanks,
Paul.
 

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Paul,


the phone # is 916.716.8999. that and much more info is also on the site. i think it is easier to change the filter pre-oem as nothing has to be removed from the truck to access it. you don't have to crawl under the truck. just put 1 knee on the ground and grab the filter with a filter wrench. if you pre-fill the replacement filter you don't even have to prime the system!


you'll have to ask filter minder about their gauge. i'm not sure and wouldn't want to speculate.


the nicktane kit can only be added pre-oem. there is nowhere to mount my custom bracket up front.


when it comes to water in fuel, any water seperator won't get all of it. George Morrison has seen more fuel samples than anyone here and can attest to that. the only way to get ALL the water is to use an additive. i prefill 3 oz pharmacy bottles and just dump 1 in with each 40 gallons i add. pretty easy!


let me know if you have any more questions.





Nick
 

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Nick, from all I have read your filter sounds fantastic but I do have a question yet. If it is a 2 micron filter and the OEM is 7 micron what does the OEM do other than having the water separator? Is a water separator even needed if you use additive? Why not just get rid of the OEM filter? I'm not trying to be difficult, just trying to understand the system as a whole.
 

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THe oem filter is left mainly for warranty. i would never dream of removing it.. it also serves as a priming pump. and even though it isn't as good as the cat filter, it can still help a bit. 2 are better than one!
 
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