Micron rating on diesel engine oil filters
 

I was researching some items and discovered that the filters used on old (1960s) Simcas and Citroens were 30% more stringent than the filtration used on 1980s-90s Mercedes diesels!

What are people using now in their diesels, I am curious.

This will also make me review what I'm using in other cars I own.

Does anyone use any oil filters with 5-10 micron filtration ratings?

I'm very curious.

Thanks.

I know mann is about 8 micron. look it up in their website.

I have a Mann filter in the 300D and 240D.
There has been some long oil filter debates the past couple years and probably since the forum started. there is the one where they disected some of the filter and found the sticks, bugs and dirt, and packed with Cotton Gin waste.

I did a search but couldn`t find the one`s I was thinking of, but here is a good one. I`ll look in my notes and see if I can locate them.

http://www.peachparts.com/shopforum/diesel-discussion/252734-oil-filter-company-babble-purolator-617-a.html

Charlie

I've been using knecht filters

MAHLE | Filtration: The heart of filtration

I don't have the specs to hand though. If I manage to reach the back of the garage in the next few days I'll try and find them for you.

(I prefer the knecht filters to the Mann ones as they come with the O rings!)

FYI
 

Those threads where deleted by the OP, years ago. :(

I have a Mann filter in the 300D and 240D.
There has been some long oil filter debates the past couple years and probably since the forum started. there is the one where they disected some of the filter and found the sticks, bugs and dirt, and packed with Cotton Gin waste.

Cheers, I spent 10 years in R and D for a automotive parts supplier for fuel air and oil filtration systems. All testing and product development was done in accordance to SAE J 806 b, and JIS criteria.
On my 300 SDL 1987 I noted a 2 stage filter. pleated paper element, and a cotton element. Most paper elements, as per SAE the standard is 20 microns at 8 psi pressure differential across the media,, at this point the by pass kicks in and by passes the filter. My experience shows that as the filter media becomes more contaminated the ability to filter becomes greater, in regards to filtering smaller particles.. Since the 70's paper media has become known as depth type , thicker cross section,, meaning as the fibers swell with exposure to water it becomes tighter in terms of porosity. The same happens but much more in the cotton element. OEM requirements for our products were higher. The holding capacity, micron rating and ability to withstand pressure differential, {to prevent pleat collapsing and media migration } were more stringent.
We used AC fine dust from SAE spec. and it contained 2 to 200 micron particle size ,Millipore analysis was done and efficiency rate was normally in the 5 micron and 95% capture range but only in the last 50 % of the test. 8 to 10 hr test. contaminate feed rate of 2 grams per hour . So having babbled way too much,,I have done the following on all my vehicles one filter change every 2 oil changes,, and installed a K 55 partial flow filter cotton element that take 5 psi from oil gallery and returns it to sump,, also serves as oil cooler too . Verified that residual partial size is nominal 5 micron, and based on studies by the aviation industry, 5 micron will pass through bearing clearance with out adverse affects, as for rings to cylinder wear it is mostly a issue of end gap ..materials,, and surface finish. Water acids, and chemical formation and sludge are only cured by frequent oil changes. Cheers Dave D. caveat, applies only to autos not fleet / industrial and or stationary applications

I see part of the problem, mercedesshop.com is in the title, not Peachparts.

Here is one I was thinking of.
http://www.peachparts.com/shopforum/diesel-discussion/104768-oil-filters-one-buy.html

Here is another.
http://www.peachparts.com/shopforum/diesel-discussion/200877-oem-oil-filtration-efficiency-50%25%4027-99%25%4050.html

Charlie

B.I.T.O.G.
 

Get ready to abandon your normal lifestyle for a couple of weeks.

- Bob is the Oil Guy

I use a 15 micron as primary filter its 2 qt. size.Then a 5 micron pint size filter,then to stock.both are water traps,and I'm running diesel thru them

Thanks, oldsinner for the info on fuel filters. I'm still working on oil filters, tho' that's a good topic too.

So far, I know that Baldwin filters seem to have a filtration capability of between 18-22 microns on the several size filters for different applications.

I also want to send info to a French company called Purflux, which is famous for heavy-duty auto filters. When I go to France, I buy them for my cars.

But so far, Baldwin is in the lead, with 18-22 microns for MB diesel engines.

Additional data on other brands is appreciated.

Dave,
Thanks for the info, who makes the K-55 filter?

Some past thread:
Has the micron ratings of some makes of the 617.952 Oil Filters
http://www.peachparts.com/shopforum/diesel-discussion/247597-napa-gold-filters-3.html

I solved the Oil Filter Micron issue buy adding ona a By-pass Oil Filter that is 2 Nominal Microns.
Bypass Oil Filter Setup, 617.952 Diesel911
http://www.peachparts.com/shopforum/diesel-discussion/215593-bypass-oil-filter-setup-617-952-a.html?highlight=Bypass+Oil+Filter+Setup%2C+617.952

There is alos a thread somewhere by ForcedInduction where he added on a Amsoil By-pass Oil Filter.

K55 filter
 

Cheer, the K 55 was a Kralinator made,,,but purolater Fram,,should also carry them we sold the kit to retro fix canister braided lines and 1/8 npt fittings.
BTW In the movies Tommy Boy,,, the filter factory in the show was the one I worked at... may also be called K 55a smaller version

I use what I can find usually Mahle, but do have an Amsoil bypass filter also. This is rated at 2 microns.

Some Mann-Hummel info:
https://www.mann-hummel.com/mhuk/upload/doc/HBHCK_CtaRf.pdf

HU 951x(om606) ...HU 718/1k(om611 cdi )-99%separation efficiency at 38micron particle size.
........
And this is an older variant of the document.No mention of ISO 16 889 test yet.
http://www.mann-hummel.com.sg/EN/industrialfilters/doc/MANN%20Filters%20for%20Liquids.pdf

The Amsoil bypass filters are popular.

Yep, well, Baldwin beats that unless you can find a hydraulic high-pressure mann filter that fits your car's engine and soesn't starve it it while it passes through the filter...

The question is how long would it take for a om61X or om60x or a CR engine to clog the 2 micron filer media to such an extent to make the by-pass valve open permanently.I'd guess not very long.No thanks(unless I have a delta pressure gauge...which I dont).

Dave, I've been changing oil filter every other oil change also. What do you think of installing a pressure gauge before and after the filter to measure differential pressure and determine when to change the filter? What kind of readings should I be seeing on a new filter? At what reading should the filter be changed?

I do not understand this comment.
There is no part of the stock Filters that have a 2 micron Filter element.

When I installed my By-pass Filter I tapped into the top Lid of the Filter and installed a fitting there. A Hose goes to the By-pass Filter from there.

There is a separate Oil return Hose from the By-pass Filter that ends up dumping the Oil back into the Crankcase.

When this 2 micron Filter By-pass Filter clogs up the stock Oil Filter performs the same as it does with no By-pass Filter installed.
The Full Flow section of the Stock Oil Filter would have to clog up in order to cause the By-pass Valve in the Oil Filter Housing to function.

When I was looking at the filtration levels of different automotive full flow Oil Filters I found that the lowest was 15 micron.
Most seemed to fall in the 22-27 micron range.

On thing for sure is that the stock 3bar Gauge is inadequate for measuring a differential pressure; since the actual pressure on the high end is above 3 bar and not measured.

I do not know if this applies to only Hydraulic Filters but a 20% difference in the differential pressure is what they say as an indication of time to change the filter.

But, I would think that if the differential pressure starts to rise at all that would be a good time to change the Filter.

As the filter trap debri in the filter media, the differential pressure will start to rise. Are you saying the filter should be changed then?

Hm,I must have misread...:rolleyes:I had the impression that someone was looking for the lowest micron rating to install in place of the stock one. Me wrong,sorry.

I can't speak for what others want or look for, but I started this thread to find the best-filtering engine oil fulll-flow filter.

So far, it seems to be Baldwin unless a previous contributor would like to tell us what brand of filter provided the filtration in the 22 micron range.

Thanks!

So far I have changed my Full Flow Oil Filter every time I change the Oil.

If I had the setup you were speaking of my personal choice would be to change the Filter as soon as I see that it is starting to plug up as indicated by a rise in the differential pressure.
I would not want to wait for a 20% drop in the Oil Pressure.

I guess that clears it up for me.

Apparently it is impossible to have a 2 micron Full Flow Filter on a normal vehicle Engine.
If there was one the Filter Element would be huge and you still might have trouble moving cold Oil through it in the Winter.

In the pics you will notice that the Baldwin Oil Filter also appears to have a larger Full Flow Filter Element portion (on the bottom).
It is sad that the Baldwin/Hastings filter cost so much and is not available at a local Autoparts store.

Below is a pic of part of my By-pass Filter Element. I left it in for 2 Oil changes. (However, I did change the Stock Filter with each Oil Change.)

Clearly something is staying on the surface of the By-pass Oil Filter is not being Filtered by the Stock Oil Filter.

I have no experience with such a setup. I'd imagine that the differential pressure of a new filter will start to rise as the filter traps particals and contine to rise higher as more is trapped. Changing it as it starts to rise maybe way too early.

... the bypass section of the baldwin filter is identical to fuel oil furnace elements... what does everyone think of installing a large fuel oil furnace filter as a bypass filter... they are cheap, readily available, and the wound filter is like 2.00 each...

Mine is a String Wound filter (10 inches longX2.5 wide) and the Elements are less than $3 of you buy a case of them.
However the Filter Housing/Vessle is expensive.
I made my own Filter Housing for it but it took a lot of labor to do so.

I would be interested in a cheap source of Filter Housings.

Pic below of the Filter I am using. Also I said it was a 2 micron filte but actually it is a 0.5 micron Filter. The Cotton String can take the heat of the Engine Oil.

Know way to know if a Fuel Oil Filter would hold up to the heat of the Engine Oil.

Just an idea - how about those little airline oil separator type filter housings?