Would you ever use the same oil filter more than twice?

[ZeeOSix]

On those particular filters. Was the data peer reviewed? How many other oil filters are made?

You don't trust a test lab that is ISO certified? Every one of those filters showed a decreases in efficiency as the delta-p went up. Why wouldn't all oil filters?

If an oil filter has a pretty low ISO efficiency, the fact that is can lose efficiency with loading is most likely why the ISO efficiency is lower. The ISO 4548-12 test measures the average efficiency from new to max holding capacity. So if the efficiency decrease as is loads up, then its overall ISO efficiency will be lower.

As mentioned, filters with higher ISO efficiency will hold their efficiency better as they load up than filters that have lower ISO efficiency. What was seen in Andrew's testing on all those oil filters is what is shown below.

 

[350Rocket]

Personally if I use the filter a second time I drain it and put a gallon of really really cheap on sale conventional oil through it for a few minutes to flush out the old stuff so I don't have to worry about what's in the filter.
Call it wasteful if you want but it's cheaper than the fram ultra or m1 filter I have been using and if I didn't do the flush I would probably just change the filter.
If you're going to criticize me for it, what is your goal for mileage/engine hours? Mine is 400k/12000 engine hours. Currently at 210k/9354 hours. I don't idle as much a previous users did.

 

[Hall]

and put a gallon of really really cheap on sale conventional oil

How much are you buying that oil for ?

 

[Shel_B]

NEVER, machinery lubrication notes that proper filtering is MOST important so why put clean oil thru a DIRTY filter!!! like LIFETIME fluids a BAD choice to reuse filters especially todays DINKY LITTLE filters!

Might not the accumulated dirt and debris in the filter actually aid in filtering? That is said of engine air filters, is it not similar to engine oil filters?

 

[FordMan59]

I tend to skip filter changes more often as the car/engine gets older and higher mileage. When I retired my 518K mile '88 Ford Escort I was running 5K mile conventional oil changes with the cheapest available filters for 2 intervals. Now that the '88 is gone I do the same thing on my '02 Escort with 210K+ miles. My newer better mileage cars get both oil/filter with every change. Unless I'm mistaken back in the '60's Ford recommended 6K mile oil changes with filter change every other oil change interval and I when I bought my first new car in '77 GM recommended 7500 mile oil changes and possibly 15K filter changes.

 

[JeffKeryk]

I have to believe the difference between using a quality oil filter for 5K vs 10K is a big fat zero.

 

[CharlesInCharge]

NEVER! why do half an oil change.

How is it "half" and oil change? More like 80% without the filter, or 90% with the filter. Far from "half."
About 80% is drained, about 10% remains in the block, and about 10% in the filter (these are approximates purely to illustrate you can never easily or cost effectively git "all" of the oil out.)

 

[tyman]

All 3 vehicles are on their 2nd oil change on the same filter as of today. Just changed the Odyssey and CR-V oil today.

But as far as a 3rd time, eh maybe. I do 5k OCI's so it'd only be 15k on the filter total.

 

[ZeeOSix]

Might not the accumulated dirt and debris in the filter actually aid in filtering? That is said of engine air filters, is it not similar to engine oil filters?

Nope ... read posts earlier in this thread. It's true that air and oil filters do not behave the same as they load up, and that's because the delta-p across on oil filter can be huge compared to the delta-p across an air filter.

 

[NitroM3]

Honestly if this were a vehicle forum you all would have more responding to being just crazy not to change your oil filter when changing the sump oil. .
I realize this is basically a forum about OIL but wow!!!!!!! This thread is just wow!!
Oh and trust me I belong to a few dozen vehicle specific forums and this has come up before....and it don't go well with those members.

But as I often say and some should use the phrase.... especially in this thread...."IT WORKS FOR ME" !

 

[Shel_B]

All 3 vehicles are on their 2nd oil change on the same filter as of today. Just changed the Odyssey and CR-V oil today.

You have three vehicles that share the same filter? How do you manage that?

 

[NormanBuntz]

I have reused filters twice on cars and motorcycles several times w/o any problems. Only thing I absolutely use only once before changing are;

C'mon, man. You can get four days out of a pair. You know how to do it.

 

[NormanBuntz]

To keep from removing a splash shield with 18 screws, I've been using the Fram Ultra sister, an FPS7317, for two 5K intervals on my wife's M35. That filter can't hold more than 6-8 ounces of oil. Good enough for government work.

 

[Passport1]

C'mon, man. You can get four days out of a pair. You know how it goes.

Maybe SOP on OBX but not on TI.

 

[vavavroom]

I would not reuse a filter because I wouldn't fully trust the same compression gasket a second time around. However, I'd not suffer any mental distress over leaving the same filter in for two oil changes. I probably wouldn't go much over 20k miles on the same filter out of worry over the filter medium having deteriorated and having been structurally weakened. I might consider extended filter use only if the filter is real pain to replace.

 

[CharlesInCharge]

How much are you buying that oil for ?

$2 per qt every day. Down to 1 penny per qt on clearances and sales. But easily found at 50 cents per qt.

 

[NitroM3]

I would not reuse a filter because I wouldn't fully trust the same compression gasket a second time around. However, I'd not suffer any mental distress over leaving the same filter in for two oil changes. I probably wouldn't go much over 20k miles on the same filter out of worry over the filter medium having deteriorated and having been structurally weakened. I might consider extended filter use only if the filter is real pain to replace.

I use OBERG oil filters on a couple of my engines. And generally always use them for anything that is a "built" engine. These filters are servable by cleaning them. The servicing is a little more involved when changing the sump oil taking the oil filter service from a nice 30 minutes to about an hour. What is my point... well simple not many on this forum take apart their oil filters and look at the filtering elements each time they change an oil filter but I guarantee if you saw what gest caught and filtered out of the oil even on 3-5k mile service many of you would stop the poor habit of not changing the oil filter each time you do a sump fluid change!

This is my BABY Oberg. The other are twice this size. Oh and MOPAR use to offer them as kit in MOPAR Performance Parts.

 

[ZZman]

I have reused filters twice on cars and motorcycles several times w/o any problems. Only thing I absolutely use only once before changing are;

Only once? Is that by time or mileage?

 

[chemman]

Nope. And in the case there is something wrong with the new oil filter, well, I have a small stash of extra filters for all my vehicles so all I would need to do is walk into the garage and grab another new filter.

 

[NitroM3]

Nope. And in the case there is something wrong with the new oil filter, well, I have a small stash of extra filters for all my vehicles so all I would need to do is walk into the garage and grab another new filter.

This is a good point you make about extra filters. We always see the threads about bulk buying oil on special pricing but rarely oil filters? I am the same I have several extra oil filters for all my engines.