BOBISTHEOILGUY FILTER TESTS

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Look at the pressure drop on the M1 filter!
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I'd like to see what a Wix & AC filter show. If you'll PM/Email me a PayPal address, I'll zap you the price of a Wix 51085 & an AC-Delco PF-13; same thread & gasket as the big Ford filter, but shorter case. Hmm...maybe a Motorcraft too...
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Well, while you were posting, I went out and did the last two filters I had at the time.

Bosch Prem....
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Wix Napa 21516 Silver....
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Now, let me elaborate just a little more on what we have here....

This is useing the supertech, (cheapest oil on sale) 10w30.

This oil is not warm but in a cold state. We do have a barrel heater that we will after we conduct cold oil tests with a variable speed, then heat up and run hot tests.

At this time, I cannot state what the bypass is doing until I get the variable speed control working as needed, it's just at a stable run speed which demonstrates nothing more than pressure drop across the filter at 40+-psi input.

[ March 26, 2003, 02:19 PM: Message edited by: BOBISTHEOILGUY ]
 
Maybe this setup could eventually determine how much of a benefit oversized filters really are. (mobil m105 vs. m104 for example).
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Sure, I'd appreciate any help with the costs. I'm going to keep looking for filters and add to our line for testing as well. I have a paypal link on the bottom of the left side of the main page, bobistheoilguy.com if you want to use the computer. They do charge us a fee for using that service, but if you want to send a check here's the address. Thanks.

B. Winters
540 Sailfish Dr. E.
Atlantic Beach, Fl. 32233
 
This is great! A couple of questions though...Is psi drop from input to output an exact proxy indicator for flow vs using some sort of flow meter? Also, we would have to assume that the bypass isn't leaking or opening thereby possibly providing misleading results. Perhaps testing some of the filters with no bypass valve (ie, those for some GM products) would take this out of the equation.
 
You all have some great questions/suggestions.

First, let me point out, these are cold oil tests.

Second, we do have a thermistaticly controlled barrel heater so temp can and will be set for 200 deg constant once we get to that phase.

Third, I'm looking into maybe a gas powered motor to run these tests with instead of this electrical dc motor. This way we can set idle speed pressure at the bearings with a constant rpm speed on the engine with no filter, then just apply each filter with the same base settings for a more constant look.

I have just acquired a pressure gauge setup to check on antidrain back valves as to how well they seal or not. This may or may not work, wont know until I implement it. Soon as I try it I'll give you the feed back on it.

Currently, all the filters I am working with are for the 1.9L ford escort I have, so to stay consistant with filter parameters with each other. As you can see, there is some size variances. I am looking to find two filters from the same company so to ensure both designs are simular, and see just how size would make a difference in flow which is a good question that many want/need answered including myself.

Currently, aside from those filters you see above, I have now picked up a pure One, Purolator premium plus,motorcraft,napa gold,and fram tough guard.

Will be posting as I get these on line.

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Glad to see the results correspond with my permeability tests
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(Not that I am surprised
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Still very cool!!
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AS far as bypass, looks like the Bosch and M1 are in bypass with a 11 and 10psid respectively. But this is cold oil, so no surprise either. I think we will see likely none of them will go into bypass with hot oil. Which is what I thought as well. Over time being loaded with dirt, the M1 and Bosch will be the first to bypass hot. You're next mission...find out when that is
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Intersting also is a European filter such as mine or on Audi/VW with bypasses in the 30psid range should never bypass even on a cold start in warmer weather. Maybe in winter for a bit.
 
No, the bypass valve is usually just a coil spring calibrated to allow a plunger to begin opening at a certain pressure drop to relieve some pressure. From what I have seen, most American cars has bypass valves of 9-11 psid, thus my reasoning for the Bosch and M1 being in bypass. If the pressure drop falls below 9psid, the valve will be closed.
 
Well, I'm glad you have it figured out as I'm still learning on how and when it really is working. Hopefully I'll have some real data to see exactly what and when. Until then, you're the man!

Well, here's some more..
To start with, I decided to take a temp reading on the oil.. Yep, figured if Jason says the oil is thick in this mode and causes the by pass to open, well, lets see the temp. in this case around 77degs.

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Now the one I thought was really interesting was the Fram Tough Gaurd. I really didn't expect this and I did it four times to make sure I wasn't doing something different.

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Here's the Napa Gold, silver was earlier...
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Now the purolators...
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The purolator Plus
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Motorcraft....
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STP
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Looks like the Amsoil, K&N and STP had similar flows (K&N started out slightly higher so that may account for slightly higher outflow?)All others slightly less it seems, Fram Tough Guard wow. What's in that thing?
 
Aren't the STP and the Supertech supposedly identical? If so, the Supertech looks more and more like the bargain of the century for oil filters!
 
Lets see - seems some of the thoughts about there being too much material in the Pure Ones may be true. On top of that, it looks like the Pure One and Motorcraft were pretty similar. The difference I noted when cutting those open was the bypass valve - type and location.

Man - whats up with the tough guard! Sure doesn't look much different on the inside than the other frams!
 
I can't wait until these same filters are subjected to the hot oil. It'll be interesting to see if the pressure drop remains the same, or if some of the filters that previously did bad on this test will turn around and do better on the hot oil test.

For me, the hot oil test is going to be the real idea of which filter flows the best.
 
im outstanded by the pressure decreases of all the filters. is the restrictive of the filter the source of valve ticking at startup? i used to get ticking on a bosch filter in all my cars, now i use supertech dont get that...but i get clicking around 2k rpm now. is this because of the pressure drop? hahah and i was thinking of going with mobil 1.
 
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