used filter?
- Thread starter kcfx4
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Some manufactures recommend changing the filter after every other oil change. It is believed that oil filters can trap more contaminates as the filter media loads up.
When I was doing it, I would remove the old filter and drain as much oil as I could, inspect/wipe down and re-install. I know some folks just add less oil. A lot of manufacture's service manuals list the fluid amounts for an oil change with and without a new filter.
A filter holds about 1/3 of a quart.
Recent thread: http://www.bobistheoilguy.com/forums/ubb...274#Post1864274
Recent thread: http://www.bobistheoilguy.com/forums/ubb...274#Post1864274
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bluestream i was making up numbers for simple math. ok so car maker A says change it each time, while car make B says ah every other times fine, wouldnt commonsence tell us if your taking time/money to change oil lets go ahead and change filter?
Mine holds half.
Dry spec for my car is 6.2qts. Oil & filter change is 6.0 quarts or ~97% change out. Sump change only is 5.5 qts or ~89% change out. That 8% isnt going to make any difference as long as the interval is reasonable.
Dry spec for my car is 6.2qts. Oil & filter change is 6.0 quarts or ~97% change out. Sump change only is 5.5 qts or ~89% change out. That 8% isnt going to make any difference as long as the interval is reasonable.
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Probably both. I just don't like to chance it any more personally.
I have used ST filters for well over 10k with zero problems in the past. I usually don't pay over $2.24 a filter these days so I have just got into the habit of tossing on a new filter. Plus, I usually keep a good stash on hand so it's not an issue.
I have used ST filters for well over 10k with zero problems in the past. I usually don't pay over $2.24 a filter these days so I have just got into the habit of tossing on a new filter. Plus, I usually keep a good stash on hand so it's not an issue.
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Both, at the same time.
I was using a Amsoil EaO ($$) which is advertised to go 25k miles or one year with their oil.
But I am not using Amsoil oil and it needed to be changed more often because of my short and hard driving plus idling.. about 5k max.
No reason to change the filter at 5k as its only the oil that is done, so thats what I did. Effective cost of the filter is halved.
FWIW, the insolubles on the second load of oil was lower than the first.
Im using a PureOne now, which isnt nearly as expensive. I may or may not do two runs. Looking at how long its taking me to put on miles, it will probably get changed.
I was using a Amsoil EaO ($$) which is advertised to go 25k miles or one year with their oil.
But I am not using Amsoil oil and it needed to be changed more often because of my short and hard driving plus idling.. about 5k max.
No reason to change the filter at 5k as its only the oil that is done, so thats what I did. Effective cost of the filter is halved.
FWIW, the insolubles on the second load of oil was lower than the first.
Im using a PureOne now, which isnt nearly as expensive. I may or may not do two runs. Looking at how long its taking me to put on miles, it will probably get changed.
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I do run my filter twice now when I run conventional, and it's also stated in the owners manual to change the filter every other time (owners manual does not state anything about extending OCI for synthetic..however I do). I figure I trust the filter enough to run out to 15k on synthetic so I'm just wasting money by changing the filter every time with conventional at 7500 miles. I used to be a strong proponent of a filter change with every oil change. Now I think the OEM has done enough research, and trusting enough for some low grade filters in OEM applications I have no problem whit premium filters I choose. The small amount of oil is minuscule when it comes to the total oil capacity..sure it's nice to get it all out, however what is in there after a complete OCI should not be damaging to anything.
I don't try to push my opinion off on anyone who is against running the filter for two OCI's on conventional, however if your owners manual states so I don't see why so many people have a problem with it. My 02 accord is a very cheap car to maintain oil wise with a filter every 15k, and conventional every 7500 miles !! I enjoy it.
I don't try to push my opinion off on anyone who is against running the filter for two OCI's on conventional, however if your owners manual states so I don't see why so many people have a problem with it. My 02 accord is a very cheap car to maintain oil wise with a filter every 15k, and conventional every 7500 miles !! I enjoy it.
me either, i would never dream of changing the oil and not the filter. i wanted other opinions as i got into a bit of an arguement on the small engine form with this. i actually got way off the original subject, i wanted other input, and still want more, even tho i read the attachment
kcfx4
edit to add this is running on a 02 Honda Accord
7500 miles is not that much at all really, I have run over 15k on Honda Accords with Mobil 1 EP, however I do admit I cut synthetics shorter around 12-13k. 7500 miles on these engines does not deplete the oil I assume from the OEM, and also UOA's from the forum as well. You could go even cheaper on oil changing it out every 1500 miles if you wish, however a filter change, nor a shorter oil change interval will not extend the life of an engine if both are still within range of quality.
Changing the oil, or oil filter just gives people a warm fuzzy feeling, if the oil or filter are not depleted, or at capacity (or more accurate at a given percentage before depleted/full of contaminates) then changing the oil/filter is not going to extend your engine life. It's not any better on your engine internals, it's not going to keep your engine any cleaner, etc etc.
A big myth going around that changing oil out early is better, I can't for the life of me understand why this gets repeated so much. How is changing oil, or a filter earlier going to extend the life of your engine ? If your reply is contaminates, new additives, etc etc then it's just wrong as studies by many people including the engine builders, oil makers, and many more show that both filters, and oil will "protect" (that's a word that's way over used) filters/oil will still lubricate, and hold contaminates, with additives left.
edit to add this is running on a 02 Honda Accord
7500 miles is not that much at all really, I have run over 15k on Honda Accords with Mobil 1 EP, however I do admit I cut synthetics shorter around 12-13k. 7500 miles on these engines does not deplete the oil I assume from the OEM, and also UOA's from the forum as well. You could go even cheaper on oil changing it out every 1500 miles if you wish, however a filter change, nor a shorter oil change interval will not extend the life of an engine if both are still within range of quality.
Changing the oil, or oil filter just gives people a warm fuzzy feeling, if the oil or filter are not depleted, or at capacity (or more accurate at a given percentage before depleted/full of contaminates) then changing the oil/filter is not going to extend your engine life. It's not any better on your engine internals, it's not going to keep your engine any cleaner, etc etc.
A big myth going around that changing oil out early is better, I can't for the life of me understand why this gets repeated so much. How is changing oil, or a filter earlier going to extend the life of your engine ? If your reply is contaminates, new additives, etc etc then it's just wrong as studies by many people including the engine builders, oil makers, and many more show that both filters, and oil will "protect" (that's a word that's way over used) filters/oil will still lubricate, and hold contaminates, with additives left.
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If you have a clean engine with no sludge, you're filtering clean oil,skip a change.Sludged engines or doing treatments ,de-sludging ...EVERY change.
For newer vehicles, it's not OCI vs. protection on this forum-- It's how many miles can I go without everyone thinking I change my oil too soon.
Doesn't matter that some manufacturers have been recommending an OCI > 10k for more than a decade.
Doesn't matter that some manufacturers have been recommending an OCI > 10k for more than a decade.
Originally Posted By: Bluestream
A filter holds about 1/3 of a quart.
Recent thread: http://www.bobistheoilguy.com/forums/ubb...274#Post1864274
The amount of oil held in a filter is very dependent upon the size of the filter. The so-called "thimble filter" from the 04 G35 I drove for a couple years undoubtedly held less. The oversize M1-209 I regularly used on my wife's Sequoia undoubtedly held more.
All this said, I've cut all of them open, more than once. And my wife's current ride, the Avalon, see below, uses a cartridge design, so element inspection is absurdly easy (the ONLY advantage to this particularly PITA cartridge design...). In almost ten years of filter autopsies, I've yet to discern any sign of the element loading up such that it NEEDED to be changed. I still change at every OCI, primarily because they're relatively cheap, but no, I don't think most of us really NEED to change at every OCI. I'd go so far as to say that if one is following recommended maintenance schedules, leaving a filter's worth of old oil (which probably has a few k miles of serviceability left) in place is just no big deal.
A filter holds about 1/3 of a quart.
Recent thread: http://www.bobistheoilguy.com/forums/ubb...274#Post1864274
The amount of oil held in a filter is very dependent upon the size of the filter. The so-called "thimble filter" from the 04 G35 I drove for a couple years undoubtedly held less. The oversize M1-209 I regularly used on my wife's Sequoia undoubtedly held more.
All this said, I've cut all of them open, more than once. And my wife's current ride, the Avalon, see below, uses a cartridge design, so element inspection is absurdly easy (the ONLY advantage to this particularly PITA cartridge design...). In almost ten years of filter autopsies, I've yet to discern any sign of the element loading up such that it NEEDED to be changed. I still change at every OCI, primarily because they're relatively cheap, but no, I don't think most of us really NEED to change at every OCI. I'd go so far as to say that if one is following recommended maintenance schedules, leaving a filter's worth of old oil (which probably has a few k miles of serviceability left) in place is just no big deal.
I change the filter at each OCI, have done so for years and will continue too. Old habits die hard. People drive themselves nuts trying to extract each and every single drop of oil out of an engine, then use a filter for more than one OCI. I'd rather know that everything is fresh and clean, besides filters are cheap IMO. YMMV
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