Changing filter every other oci

[DBMaster]

Originally Posted By: supton
Surprised no one changes the filter 2x the OCI. Half to a full quart of fresh oil to freshen up the oil, and if one had any reservations of the filter lasting, well no more reservations.


I used to do that when I first changed to 10K OCI's back in the 90's. I had increased my OCI with synthetic oil in 1989 to 7K. I wasn't feeling comfortable with 10K on one filter so I switched to 5K filter change, 10K OC.

Now, I go 30K miles using three filters. These are microGreen, though, and that's their intended use.

 

[Shannow]

LOL, not the convincing argument is it ?

The Paradise Garage oil tests indicated that a perpetual removal of an amount and top back up produced a stable "oil condition" over time (In their case 17,000 miles IIRC).

That, and the fact that
* used oil contains more variable species of Zn and Mo additives (not just a single species like fresh oil has)
* if there was nothing for your filter to cach, then there's no drama in re-using it
* if there's something for your filter to catch, then it's filtering better on the second OCI

Has finally convinced me to (provided I'm sticking to a brand of oil, I'm pretty well monogamous now) stick to the life of the filter, and how ever many OCIs it takes to get there.

 

[BlueOvalFitter]

Originally Posted By: DoubleWasp
Originally Posted By: BlueOvalFitter
Originally Posted By: FastLane
For people who discuss oil, you guys are cheap! Put a new oil filter on!

+1!

"One Filter, One OCI!"

No technical information included, as usual.

No need to. It's a proven fact.
If my replies bother you, then don't read them!

 

[MinamiKotaro]

I've been doing it for a while now. Works great.

 

[jdavis]

Originally Posted By: Shannow


* if there's something for your filter to catch, then it's filtering better on the second OCI



I'm not getting this, what am I missing here? lol

 

[Chewie]

Originally Posted By: jdavis
Originally Posted By: Shannow


* if there's something for your filter to catch, then it's filtering better on the second OCI



I'm not getting this, what am I missing here? lol


Anything caught in the filter will further narrow the "openings" in the filter material through which other particulates would travel, thereby increasing the efficiency. Think about it like a sewer grate catching leaves... the more leaves that are caught in the grate, the more likely it will be to catch additional and/or smaller leaves until the grate is completely blocked (which equates to bypass mode on an oil filter).

 

[jdavis]

Originally Posted By: Chewie
Originally Posted By: jdavis
Originally Posted By: Shannow


* if there's something for your filter to catch, then it's filtering better on the second OCI



I'm not getting this, what am I missing here? lol


Anything caught in the filter will further narrow the "openings" in the filter material through which other particulates would travel, thereby increasing the efficiency. Think about it like a sewer grate catching leaves... the more leaves that are caught in the grate, the more likely it will be to catch additional and/or smaller leaves until the grate is completely blocked (which equates to bypass mode on an oil filter).


Isn't bypass mode.. bad....?

 

[bbhero]

It highly unlikely it will ever go into bypass mode. Certain Fram Ultras can hold up to 32 grams of contaminants. It would take a whole lot of real contaminants to cause an issue. What are the odds a filter could go I to bypass with a bitog member?? Very low I bet

 

[69GTX]

As the filter loads up, the differential pressure increases. The filter could start to tear before ever reaching oil bypass mode.

Ever since I pulled a Fram Ultra XG2 off my last 4K mile oil change, I'm not so sure about a 2X interval on the same filter. That filter weighed at least 2X as much as a new one. That's basically 3/4-1 lb of "something" extra in that filter. It drained for weeks too. It weighs about the same as a full quart of motor oil. And when I pre-filled one of these the last time, it took around 16-20 oz of fresh oil. So for a filter that can handle 32 grams of material - there's 10X-15X that in my XG2. And my car is no sludge monster.

The interesting part is that the Puro Pure 1 that preceded this XG2 didn't load up with much of anything. It was basically the same weight as a new one. Another XG2 is on the car so I get to check this again in May/June. It's possible the old filter has to sit out in the hot summer sun for days to remove every last ounce of dirty oil.

 

[HTSS_TR]

Originally Posted By: 69GTX
As the filter loads up, the differential pressure increases. The filter could start to tear before ever reaching oil bypass mode.

Ever since I pulled a Fram Ultra XG2 off my last 4K mile oil change, I'm not so sure about a 2X interval on the same filter. That filter weighed at least 2X as much as a new one. That's basically 3/4-1 lb of "something" extra in that filter. It drained for weeks too. It weighs about the same as a full quart of motor oil. And when I pre-filled one of these the last time, it took around 16-20 oz of fresh oil. So for a filter that can handle 32 grams of material - there's 10X-15X that in my XG2. And my car is no sludge monster.

The interesting part is that the Puro Pure 1 that preceded this XG2 didn't load up with much of anything. It was basically the same weight as a new one. Another XG2 is on the car so I get to check this again in May/June. It's possible the old filter has to sit out in the hot summer sun for days to remove every last ounce of dirty oil.

The used filter retained most used oil in it even when it was up side down to drain, because the ADBV prevented the oil from draining out.

32 gram of contamination is a lot for a clean engine without sludge. If an engine sheds 8-10 grams of metals in 10-15k miles that engine is dying, doesn't matter how good an oil filter is and how short the OCI/FCI is that engine would not staying alive for long.

Honda engineers know their engines better than anyone else, they're recommending changing oil filter at second oil change for many models and engines, but they recommend changing oil filter at every oil change for S2000. Also, oil filter for S2000 is designed very specific for that car only(it can be used for other engines), and 10W30 is recommended not xW20 for other engines.

If you don't trust the engineers who design and test the engines, then whom do you think knows those engines better ?

 

[69GTX]

Originally Posted By: HTSS_TR
....The used filter retained most used oil in it even when it was up side down to drain, because the ADBV prevented the oil from draining out....


That doesn't seem to be the case because none of the used and empty oil filters I have laying around show any real difference in weight vs. a new filter....except this last XG2. That would mean that the Pure 1, Mobil 1 and others don't have working ADBV's as they feel light as a feather in comparison. There's definitely more going on with this particular XG2 filter for it to have doubled up from its dry weight. Maybe it's a characteristic of the Fram Ultra's. This is the first one I've pulled off.

 

[FCD]

Anyway, getting back to the topic, am i really doing any harm changing the filter every 2 years? Unyil now it's been ok running a 10w40 synthetic blend but i'm running a conventional a.k.a dino 20w50, certainly the oil has gotten darker sooner

 

[virginoil]

Originally Posted By: SR5
Originally Posted By: KingCake

Truth be told oil filters do very little in a well maintained engine with a good air filter and no air leaks.

I tend to agree with this, once a car is run in, and if it's properly maintained (good air filters, correct OCI & no sludge, etc) then an oil filter should have very little to do in a well kept car.


Very broad generalization here.
Capacity of the sump comes into question here and is important.

Changing filter every 5000km or once a year no issue.

In a small capacity sump I would change the filter every oil change.

 

[CELICA_XX]

So many people on here try to make this a debate on the lifespan / capacity of the oil filter itself.

Most everyone understands that a high quality filter will have the ability to function properly for a very long OCI in a clean engine.

The reason I lean towards a new filter every time is because SO much oil drains from the block when I remove my filter.

I prefer not to begin a new OCI with that much dirty oil in the system.


Originally Posted By: KingCake
you know how much old oil is left in your engine anyway? It's not a problem.

Very little from my experience... especially in a small economy car.

• I measure what drains out vs dry engine capacity
• I tilt the car in different directions with a floor jack during draining to facilitate a more complete drain
• I drain until the oil stops

 

[HerrStig]

Change a lot of oil filters on the 67 Bug?

 

[JerryBob]

Originally Posted By: BlueOvalFitter
Originally Posted By: FastLane
For people who discuss oil, you guys are cheap! Put a new oil filter on!

+1!

"One Filter, One OCI!"

Why?

 

[steveh]

Originally Posted By: JerryBob
Originally Posted By: BlueOvalFitter
Originally Posted By: FastLane
For people who discuss oil, you guys are cheap! Put a new oil filter on!

+1!

"One Filter, One OCI!"

Why?
Even if your car is out of warranty and the filter fails. The filter company will only back the product if you follow your owners manual OCI.

 

[jdavis]

Originally Posted By: CELICA_XX

[*]I tilt the car in different directions during draining to facilitate a more complete drain


Hulk, is that you?

 

[BlueOvalFitter]

Originally Posted By: JerryBob
Originally Posted By: BlueOvalFitter
Originally Posted By: FastLane
For people who discuss oil, you guys are cheap! Put a new oil filter on!

+1!

"One Filter, One OCI!"

Why?

Why not?

 

[Stewie]

Originally Posted By: BlueOvalFitter
Originally Posted By: JerryBob
Originally Posted By: BlueOvalFitter
Originally Posted By: FastLane
For people who discuss oil, you guys are cheap! Put a new oil filter on!

+1!

"One Filter, One OCI!"

Why?

Why not?


Waste of money.

Filters even become better when used for extended OCI if it is rated for it.