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Fill oil filter at every oil change #5419048 05/02/20 10:26 AM
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Paul_Siu Offline OP
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I was watching a video recently where the person suggest filling the filter with oil before putting it on because it reduce wear that can occur when you restart the car after an oil change. The idea is that you get some wear because the engine don't get oil until the filter fills with oil and transfer to the engine. Is there some truth to this. This is the first time I heard of it.

Paul

Re: Fill oil filter at every oil change [Re: Paul_Siu] #5419056 05/02/20 10:35 AM
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Snagglefoot Offline
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If it feels good, do it. This gets discussed a lot. smile


If you want the job done right......do it yourself.
Re: Fill oil filter at every oil change [Re: Paul_Siu] #5419062 05/02/20 10:42 AM
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blufeb95 Offline
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There's some truth to it, probably more of a problem on diesels with huge oil filters I believe CAT recommends prefilling oil filters, but we're talking about filters that probably hold a couple quarts on their own. Most passenger car filters should fill pretty quick and any left over oil in the engine should lubricate it while the filter primes, some people like to crank over the car for a few seconds in clear flood mode to prime the filter before starting the car.

Re: Fill oil filter at every oil change [Re: Paul_Siu] #5419076 05/02/20 10:58 AM
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LotI Offline
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Did that horse come alive again?

If the filter is base-up, pre-fill away. I like to pour a bit in to wet the media so it doesn't get a 50psi shockwave of cold oil.


03 Honda Interceptor
11 Kawasaki KLR 650
12 Ford E450
19 Buick Regal TourX
Re: Fill oil filter at every oil change [Re: Paul_Siu] #5419083 05/02/20 11:08 AM
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kschachn Offline
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Apparently today is the day for massively discussed subjects to be discussed yet again.


1994 BMW 530i, 252K
1996 Honda Accord, 288K
1999 Toyota Sienna, 434K
2000 Toyota ECHO, 284K
Re: Fill oil filter at every oil change [Re: Paul_Siu] #5419084 05/02/20 11:09 AM
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farrarfan1 Offline
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Here's a similar discussion that was started just a few days ago.

https://www.bobistheoilguy.com/foru...one-else-pre-soak-the-filter#Post5409865


If laughter is the best medicine, then why do sick people go to doctors instead of comedians?
Re: Fill oil filter at every oil change [Re: kschachn] #5419087 05/02/20 11:13 AM
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PimTac Offline
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Originally Posted by kschachn
Apparently today is the day for massively discussed subjects to be discussed yet again.

Seems like there used to be another member from Schaumburg IL. Haven’t heard from him lately.


2017 Mazda CX5
Mobil 1 Annual Protection 0w20
Roki OEM filter.
Re: Fill oil filter at every oil change [Re: Snagglefoot] #5419089 05/02/20 11:18 AM
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HowAboutThis Offline
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Originally Posted by Snagglefoot
If it feels good, do it. This gets discussed a lot. smile


I disagree. It's very important to fill the oil filter first. If you forget to fill the oil filter and start your car and remember you forgot to fill the oil filter IMMEDIATELY shut your car down, drain the oil (there are extra metals and wear particles because you forgot to fill the new filter with oil), refill with fresh oil, do a UOA of the old oil, put a new filter on filled with oil (there might be metal in the old one due to the millisecond it took to fill it) package the old oil & filter up and PM me so I can dispose of it properly due to the extra metals from an unfilled oil filter (I'll pay up to $10 in shipping if it's a name I've heard of synthetic), then turn your car to the "on" position and off 3 times, then start it, flash your high beams 5 times, and drive with your flashers on for the first 25 miles. It's IMPERATIVE you follow this procedure but ONLY if it's 0w20 and a filter that fits a Subaru or Toyota because I need the used oil and filter you RUINED for my cars.

Re: Fill oil filter at every oil change [Re: Paul_Siu] #5419091 05/02/20 11:18 AM
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ABN_CBT_ENGR Offline
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Originally Posted by Paul_Siu
Is there some truth to this. This is the first time I heard of it.

Paul


Yes, a degree of conditional truth

In the perfect world, yes there is a microsecond where a "void' of lubricant could have an adverse effect but on planet reality these scenarios are the exception.

Basically there are 2 types of systems where caution is advised.

One is a true high stress/pressure machine where that millisecond void ( or dip) in lubrication can matter

The other is where inrush pressure ( and fluid density in a Poisson effect) can "crush" an empty filter ( sometimes happens on screw compressors)

Usually machines in these risk categories have safeguards like prestart flow pumps, running to temp/pressure before start or a no load ramp cycle , minimum pressure valves and so forth but you are better off filling the filter.

Whether that matters on an IC engine or not? I seriously doubt it and would need some detailed FEA to convince me otherwise.

Re: Fill oil filter at every oil change [Re: farrarfan1] #5419094 05/02/20 11:21 AM
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HowAboutThis Offline
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Originally Posted by farrarfan1
Here's a similar discussion that was started just a few days ago.

https://www.bobistheoilguy.com/foru...one-else-pre-soak-the-filter#Post5409865


I presoak my engine & cabin air filters in pollen, grass from hay trucks, bees, and dirt. They filter better that way I saw on YouTube.

Re: Fill oil filter at every oil change [Re: Paul_Siu] #5419096 05/02/20 11:25 AM
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Bud Offline
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Flip a coin.


2016 Honda Pilot EX-L with NAVI.....Mobil 1 0w20 AFE and Honda OEM Filter
Re: Fill oil filter at every oil change [Re: Paul_Siu] #5419158 05/02/20 12:46 PM
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rob1715 Offline
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Yes, fill the filter, let it soak in, then refill. I get nearly 1/2 qrt. in mine.

Re: Fill oil filter at every oil change [Re: Paul_Siu] #5419222 05/02/20 02:42 PM
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Paul_Siu Offline OP
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Sorry I did not realize this was a commonly asked question. I did do a few searches, but I didn't search for presoak filter, etc. I was curious to see if there is some truth to the statement. It also makes sense that this is more of an issue with vehicle with large filters.

If we just idle the car for a while, would that be enough to get oil circulating at lower rpm?

Paul

Re: Fill oil filter at every oil change [Re: Paul_Siu] #5419230 05/02/20 02:52 PM
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ABN_CBT_ENGR Offline
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Originally Posted by Paul_Siu
Sorry I did not realize this was a commonly asked question. I did do a few searches, but I didn't search for presoak filter, etc. I was curious to see if there is some truth to the statement. It also makes sense that this is more of an issue with vehicle with large filters.

If we just idle the car for a while, would that be enough to get oil circulating at lower rpm?

Paul


assuming all things equal and functioning properly

The oil is circulating the second the engine rotates and the pump is adequate for design lubrication at all ranges ( if you need more for a specific thing that's a different animal)

Re: Fill oil filter at every oil change [Re: HowAboutThis] #5419258 05/02/20 03:25 PM
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CONMCK Offline
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Originally Posted by HowAboutThis
Originally Posted by Snagglefoot
If it feels good, do it. This gets discussed a lot. smile


I disagree. It's very important to fill the oil filter first. If you forget to fill the oil filter and start your car and remember you forgot to fill the oil filter IMMEDIATELY shut your car down, drain the oil (there are extra metals and wear particles because you forgot to fill the new filter with oil), refill with fresh oil, do a UOA of the old oil, put a new filter on filled with oil (there might be metal in the old one due to the millisecond it took to fill it) package the old oil & filter up and PM me so I can dispose of it properly due to the extra metals from an unfilled oil filter (I'll pay up to $10 in shipping if it's a name I've heard of synthetic), then turn your car to the "on" position and off 3 times, then start it, flash your high beams 5 times, and drive with your flashers on for the first 25 miles. It's IMPERATIVE you follow this procedure but ONLY if it's 0w20 and a filter that fits a Subaru or Toyota because I need the used oil and filter you RUINED for my cars.

What's your mailing address??

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