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7317 or 6607? #5273380 11/21/19 08:00 AM
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cwilliamsws6 Offline OP
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Just curious which one is the more popular choice here. My CR-V calls for the 7317 size filter but the 6607 cross-references with it, and the first oil change I did after I took ownership of this car I actually used a 6607 filter because the store I was at didn't have any 7317s in stock.

I know the 6607 is significantly smaller than the 7317 but what does that mean efficiency wise? Is there enough difference for it to really matter?


2007 Honda CR-V LX "The Linoleum Falcon" 210K miles
HK conv 5w20, STP blue bottle, PrimeGuard POF4610 filter.
"Bad decisions make good stories."
Re: 7317 or 6607? [Re: cwilliamsws6] #5273387 11/21/19 08:08 AM
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Sayjac Offline
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Size alone doesn't change efficiency of same exact filter brand compared. What you're really looking at is holding capacity and in a well maintained vehicle you'll not approach it even in the 6607 size. In fact many/most quick lubes and indies use the 6607 for 7317 size. That said, where possible using the spec size 7317 preferable imo. Or, where access permits in place of the 6607.

Re: 7317 or 6607? [Re: Sayjac] #5273395 11/21/19 08:17 AM
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Originally Posted by Sayjac
In fact many/most quick lubes and indies use the 6607 for 7317 size. That said, where possible using the spec size 7317 preferable imo.
Almost every Honda that comes into a Walmart for an oil change leaves with a 6607. My own car would get the 7317 everyday of the week.


2017 Volkswagen Jetta 1.4T - 2015 Honda CRV 2.4 - 2012 Volkswagen Jetta 2.0 - 2007 Chevy Trailblazer 4.2 - 2003 Ford Taurus 3.0 Vulcan
Re: 7317 or 6607? [Re: cwilliamsws6] #5273401 11/21/19 08:23 AM
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racin4ds Offline
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Larger the filter the more filter media and more capacity it has. If you do very short OCI's then it doesn't matter but if you're doing 10K+ OCI's then you better run the bigger, OEM Spec'd filter.


Just say NO to thin oils and M1!
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Re: 7317 or 6607? [Re: cwilliamsws6] #5273402 11/21/19 08:23 AM
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Jimzz Online Happy
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Yea the 7317 size is what I buy by the case since it fits most hondas, nissans, and even newer subarus.

But some filter makers, and shops now, have dropped the 7317 size in favor of the 6607 size only. I have not run into a car that the 7317 could not fit.


yup
Re: 7317 or 6607? [Re: cwilliamsws6] #5273412 11/21/19 08:30 AM
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Sayjac Offline
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Since holding capacity mentioned and main consideration, I often refer to what Jim Allen posted about OF holding capacity in a post here.

"....the average filter in the average car at the average OCI/FCI is less than 50% loaded when removed. Doesn't apply to everyone, of course, but i you have your inputs under control (mainly a good air filter) then you should fit at or below that average...."

I expect most that post and read here at least fit that profile, probably much better.

Re: 7317 or 6607? [Re: cwilliamsws6] #5273417 11/21/19 08:39 AM
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blupupher Offline
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I like the 7317 because it makes me feel better vs the 6607.

I actually use a 3593a or 9688 size in applications that call for the 6607/7317 (if I have the room, which I do in all the vehicles I service using this size). About the same length as the 7317, but larger diameter.

But as said, in reality, even the smaller 6607 is fine for a regular oil change interval.
Also as mentioned, most quick lubes don't even carry the 7317 size any more, and I know the Supertech line at Walmart no longer has that size.


6mo:'18 Santa Fe:PP 10W-30/OEM, '18 Soul:Synpower 5W-30/PG, '10 Santa Fe:Synpower5w-30/D+, '04 F150/Magnatec 10w-30/ST
1yr: '12 xB:M1EP 0W-20/CQB, '02 F150:Magnatec 5W-20/D+, '94 VT1100:Peak 15W-40/D+
Re: 7317 or 6607? [Re: cwilliamsws6] #5273423 11/21/19 08:44 AM
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Imp4 Offline
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Given the choice, I'd select 9688.
10% larger than a 7317 and only 1/2 inch longer.
Nearly 50% larger than a 6607 and only 3/8 inch longer.

I believe ST doesn't even make a 7317 anymore and they point customers to the 9688 option.


2001 Mitsubishi Galant 2.4 - 165k+
Grandma's creampuff...
Re: 7317 or 6607? [Re: racin4ds] #5273428 11/21/19 08:47 AM
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Originally Posted by racin4ds
Larger the filter the more filter media and more capacity it has. If you do very short OCI's then it doesn't matter but if you're doing 10K+ OCI's then you better run the bigger, OEM Spec'd filter.



If you can fill up the capacity of a 6607 with contaminants in 10k miles you have bigger issues with the engine. In reality it doesn't matter, even though the 7317 allows for slightly more oil capacity. I buy 7317 sized filters mostly because they seem to be cheaper and I'll buy a few at a time for my family's Hondas.


1998 Jeep Wrangler Sahara 4.0L/5MT (156k) - PHM 10w30, Wix 51085
2009 BMW 328i N51 (53k) - Castrol Edge Euro 0w40, MANN HU816X
Re: 7317 or 6607? [Re: jeepman3071] #5273434 11/21/19 08:53 AM
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Sayjac Offline
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Quote
...If you can fill up the capacity of a 6607 with contaminants in 10k miles you have bigger issues with the engine..
Fwiw, I agree with this.

Re: 7317 or 6607? [Re: cwilliamsws6] #5273483 11/21/19 10:06 AM
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Here is my thinking on using the larger filter. Initial cold start-up oil flow through the filter media is laminar and the resulting pressure drop is directly proportional to flow velocity and viscosity. Since the viscosity of motor oil is about 100 times higher at 0 F than at 212F, the differential pressure across the filter media could be 100 times higher at cold start-up than at operating temperature. This will certainly open the pressure relief valve that bypasses the filter until the oil warms up. I will opt for the larger filter (7317) which reduces the oil velocity through the filter media if there is reasonable clearance and if start-up temperatures are going to be below freezing.


It's not what you don't know that hurts, it's what you think you know that ain't so. Will Rogers
Re: 7317 or 6607? [Re: compratio10_5] #5273575 11/21/19 11:43 AM
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Originally Posted by compratio10_5
Here is my thinking on using the larger filter. Initial cold start-up oil flow through the filter media is laminar and the resulting pressure drop is directly proportional to flow velocity and viscosity. Since the viscosity of motor oil is about 100 times higher at 0 F than at 212F, the differential pressure across the filter media could be 100 times higher at cold start-up than at operating temperature. This will certainly open the pressure relief valve that bypasses the filter until the oil warms up. I will opt for the larger filter (7317) which reduces the oil velocity through the filter media if there is reasonable clearance and if start-up temperatures are going to be below freezing.


True that more flow area on the same media with same oil at same viscosity will lower the delta-p some. And that does help reduce bypass events during cold starts.

Don't think it's a linear relationship. The delta-p may be 1~2 psi with hot oil, so no way it's 100~200 psi with cold oil. From graphs I've seen of cold oil vs hot oil "delta-p vs flow" data, if I recall correctly a filter with around 3 psi delta-p with hot oil would have around about 20 psi with cold oil. Of course that also depends on the filter media flow characteristics. I'll see if I can find the graphs.

Re: 7317 or 6607? [Re: blupupher] #5273678 11/21/19 01:34 PM
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Originally Posted by blupupher

I actually use a 3593a or 9688 size in applications that call for the 6607/7317 (if I have the room, which I do in all the vehicles I service using this size).


Same here, and the 3593 size is almost always the cheapest on RockAuto, as well.


"The evidence demands a verdict".
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Re: 7317 or 6607? [Re: compratio10_5] #5273681 11/21/19 01:36 PM
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Originally Posted by compratio10_5
Here is my thinking .................. the differential pressure across the filter media could be 100 times higher at cold start-up than at operating temperature. This will certainly open the pressure relief valve that bypasses the filter until the oil warms up. I will opt for the larger filter (7317) which reduces the oil velocity through the filter media if there is reasonable clearance and if start-up temperatures are going to be below freezing.


^^^ Exactly why I run dual remote filters/over-size filters on most of my vehicles


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: 7317 or 6607? [Re: cwilliamsws6] #5273701 11/21/19 02:03 PM
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I use a Wix 51356XP instead of a 6607 sized filter on my Smart...


2009 Smart Pure
Pennzoil Platinum Euro 0W-40, Wix XP 51356 filter, 45 mpg...
185/55R15 General HP tires, "H" speed rated, 44 psi (300 kpa)
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