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Filter change to extend oci #5348305 02/12/20 04:12 PM
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ARB1977 Offline OP
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Does changing a oil filter help extend the life of the oil between oci. I’ve done a 10K interval with a 5K Toyota filter change on my 2015 Tacoma and added maybe a half of a qrt to top off. Granted I would need a uoa to see the progress but I was curious if let’s say I went to 20K on the oil that would mean I’ve done 3 filter changes.


2015 Tacoma 4.0L 60K (as of 02/23/18)
AMSOIL SS 0W30 / Toyota filter

2018 CRV 1.5L (as of 05/11/18)
Factory fill / Honda filter
Re: Filter change to extend oci [Re: ARB1977] #5348314 02/12/20 04:22 PM
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TTK Offline
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According to my HS Chemistry teacher, Mr. Gilbert, oil never wears out and all you have to do is change the filter. That is all he did on his 1956 6 cylinder chevy straight drive car, cool

Last edited by TTK; 02/12/20 04:24 PM.

2010 Volvo V70-3.2
Current Fill:Mobil 1 AP 5w-30
2018 Subaru Forester, 0w-20 Subaru oil
2001 Chevrolet Prism:Castrol Magnatec 5w-30

Re: Filter change to extend oci [Re: ARB1977] #5348318 02/12/20 04:26 PM
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LotI Offline
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It only extends the life because you topped off the oil. Oil filters trap more with use because they are clogging pathways internally. Filters only get particles large enough but there’s still a lot of detritus floating that can’t be filtered, hence the oil change.

The other way makes more sense. Change the oil every 5k and the filter every 10. Honda has done this for decades. The only disclaimer is that the engine needs to be clean and healthy first.


03 Honda Interceptor
11 Kawasaki KLR 650
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Re: Filter change to extend oci [Re: ARB1977] #5348321 02/12/20 04:29 PM
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ad244 Offline
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Why not just use a Mobil AP/ EP filter and go for 15,000 miles?

Re: Filter change to extend oci [Re: ad244] #5348355 02/12/20 05:09 PM
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VQ35DE Offline
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Originally Posted by ad244
Why not just use a Mobil AP/ EP filter and go for 15,000 miles?



They both are good for 20,000 mi. Mobil says.


2017 Mazda CX-5 GS AWD
Re: Filter change to extend oci [Re: ARB1977] #5348362 02/12/20 05:17 PM
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oldhp Offline
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I would like to see a test with sensors showing by-pass mode time on a oil filter that goes 20K miles. Common sense says the filter would load up as used, and would go into by-pass more often. shrug


"None of us are getting out here alive.....drink that beer.....eat that pizza......drive that Hot Rod"
"When others cut you down, remember where they came from."
"I don't run...........I just wait"
Re: Filter change to extend oci [Re: oldhp] #5348385 02/12/20 05:54 PM
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Leo99 Offline
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Originally Posted by oldhp
I would like to see a test with sensors showing by-pass mode time on a oil filter that goes 20K miles. Common sense says the filter would load up as used, and would go into by-pass more often. shrug



I just went 18,000 miles on a Fram Ultra in my Camry. Fram says it's rated for 20,000 miles. It's only going to go into by-pass if the media gets overloaded.


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles (RIP)
2004 Corolla 125,000 miles
2004 Rav4 392,000 miles
2015 Camry 90,000 miles
Re: Filter change to extend oci [Re: ARB1977] #5348405 02/12/20 06:10 PM
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whatnext Offline
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My question is: How do you know when it gets overloaded? Since I can’t tell (can you?) I’ll change the filter at every OC. Not worth my worrying about it. I can afford a new filter at every OC for my 3 vehicles.

Re: Filter change to extend oci [Re: whatnext] #5348439 02/12/20 06:31 PM
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oldhp Offline
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Originally Posted by Leo99
Originally Posted by oldhp
I would like to see a test with sensors showing by-pass mode time on a oil filter that goes 20K miles. Common sense says the filter would load up as used, and would go into by-pass more often. shrug



I just went 18,000 miles on a Fram Ultra in my Camry. Fram says it's rated for 20,000 miles. It's only going to go into by-pass if the media gets overloaded.

Originally Posted by whatnext
My question is: How do you know when it gets overloaded? Since I can’t tell (can you?) I’ll change the filter at every OC. Not worth my worrying about it. I can afford a new filter at every OC for my 3 vehicles.

I know what they say. But have they done filter load test's? If so what kind of engine, driving style, how many times oil gets recirculated per mile, etc. But a XG8A will hold more than a XG3614.


"None of us are getting out here alive.....drink that beer.....eat that pizza......drive that Hot Rod"
"When others cut you down, remember where they came from."
"I don't run...........I just wait"
Re: Filter change to extend oci [Re: ARB1977] #5348468 02/12/20 07:06 PM
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ARB1977 Offline OP
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Thanks for the thoughts. After I’m done with the factory filters I’ll head over to the fram ultra side.


2015 Tacoma 4.0L 60K (as of 02/23/18)
AMSOIL SS 0W30 / Toyota filter

2018 CRV 1.5L (as of 05/11/18)
Factory fill / Honda filter
Re: Filter change to extend oci [Re: LotI] #5348565 02/12/20 09:06 PM
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ZeeOSix Offline
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Originally Posted by LotI
Oil filters trap more with use because they are clogging pathways internally.


Not always true. Studies also show that as filters load up and the delta-p increases across the filter, captured particles in the media can slough off which essentially makes them less efficient, not more. It all depends on how well the media can retain captured particles as the delta-p inreases. That also goes for cold start-ups and high engine revs that can increase/spike filter delta-p.

Air filters typically get more efficient with use, but oil filters are different on how they behave in that regard due to the much higher delta-p across them during use.

Re: Filter change to extend oci [Re: TTK] #5348658 02/13/20 12:27 AM
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Linctex Offline
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Originally Posted by oldhp
I would like to see a test with sensors showing by-pass mode time on a oil filter that goes 20K miles. Common sense says the filter would load up as used, and would go into by-pass more often. shrug


Guess what?

They DON'T (when the oil is changed regularly)

I ran a Motorcraft FL-1A in the 1990's for 30,000 miles with regular oil changes,
and a Fram Tough Guard for 15,000 miles (2X oil changes at 7500) and it looked like brand new inside.

I recently ran a Fram Tough Guard for 50,000 miles (5x or 6x oil changes) and i haven't cut it open yet, but i guarantee you now it will look fine.

Originally Posted by TTK
According to my HS Chemistry teacher, Mr. Gilbert, oil never wears out and all you have to do is change the filter. That is all he did on his 1956 6 cylinder chevy straight drive car, cool


His oil filter was not a full-flow design.
Apples to bananas comparison.


"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: Filter change to extend oci [Re: Linctex] #5348678 02/13/20 02:42 AM
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CR94 Offline
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Originally Posted by Linctex
... I ran a Motorcraft FL-1A in the 1990's for 30,000 miles with regular oil changes,
and a Fram Tough Guard for 15,000 miles (2X oil changes at 7500) and it looked like brand new inside.

I recently ran a Fram Tough Guard for 50,000 miles (5x or 6x oil changes) and i haven't cut it open yet, but i guarantee you now it will look fine. ...
30,000 on a FL-1A might be equivalent to 10,000 on today's typical micro-filters, as far as junk captured per unit media area (in engines in which that's a potential issue).

Most of the filters I've dissected after 17-26k miles also "looked brand new inside."


2011 Toyota Prius now at 109K
1981 Mazda GLC (323) retired at 606K
1972 Subaru DL retired at 190K
1954 Chevrolet retired at 121K
Re: Filter change to extend oci [Re: ARB1977] #5348701 02/13/20 04:53 AM
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Lubener Offline
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What some will do to save a buck. All you are doing is loading up that new filter immediately.

Last edited by Lubener; 02/13/20 04:55 AM.

The "thinking" man's friend.
Re: Filter change to extend oci [Re: whatnext] #5348777 02/13/20 07:37 AM
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Donald Offline
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Originally Posted by whatnext
My question is: How do you know when it gets overloaded? Since I can’t tell (can you?) I’ll change the filter at every OC. Not worth my worrying about it. I can afford a new filter at every OC for my 3 vehicles.


You can send the filter to be analyzed.


2015 Ford F-250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
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