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I decided to not let nonsense take more of my time and continue what should be a discussion but which is not.

Date on spec sheets when test was done? Why not done in USA? MannGermany oil filters have never had high lab efficiency I don’t think. Lab efficiency uses a higher concentration of particles which means slightly more porous filters will look worse than they do in actual use. Need actual use...

The gallery where the oil pressure gauge is wouldn’t have changed size, so higher pressure means more flow all things being equal. Just a guess but maybe the smaller old filter was allowing the oil pump relief to open, reducing the flow. I don’t know if higher oil pressure within a normal range...

Of course. Nothing about other filters in topic. “So are Purolator oil filters the replacement for Fram going forward? This was the Walmart isle at my nearest store.”

I use these since they were sold, still are off and on, at fantastic prices. All the filters in the chart have the 10,000 mile note, but the red is already 10,000 of course. The 46 micron sheets have no test date. It could be when they were developing the Boss from the Mann fleece filter on...

Where would you get that idea from? The reference I gave is to the Purolator being stocked to replace Fram, the topic of the thread. It’s fine, you can get ideas from wherever you want. You do your best like everyone else.

They’re trying to stay with traditional made in USA product. I used to be against Walmart back when mom and pop stores were unable to compete with the new Walmart in town. How times have changed. The aisle is pretty small it seems to me. I don’t know or see people changing oil in their...

The one on the left probably has the possibility the adbv does not cover the holes. I looked at a couple Frams and a Supertech with this late production fiasco design. All had a visible gap at holes on one side, adbv not centered.

I am guessing material stretches under the flow patterns, not rigid enough? There is nothing wrong with your questions or posts.

Here is a test of a bypass oil filter with a particle count, put on without changing the oil and the oil retested after only 200 miles using the tp filter. https://www.frantzfilters.com/

It isn’t they are passing all the 20 micron particles every pass. If the media is accurately made, which isn’t talked about much, then use the worst examples, 50%@20 microns. At 3 gpm, 12 qts/ min, a 4 qt oil capacity circulates every 20 seconds.

No, make it the unpainted way, then paint it.

Those are “genuine oil filter” knock offs, not Toyota filters. i never questioned they wouldn’t work. I would make it the unpainted way like most if not all American engineers did back in the day.

From post 34. “Why do you think it's not going to work” referring to the Asian style seam. I never said it wasn’t. Yes they do seem a little shady for some reason, but the filters, some at least, do have the American seam. So the story I believe although I didn’t know Castrol made their own...

Of course both ways work if done right, never said otherwise. I also never said the Asian style seam leaks and isn’t going to work. I made no assumptions at all, so how can none be too many. Not changing a word I said. The most interesting thing here to me is they bought the surplus machinery...

I hashed it again. That’s a hard crimp, they put adhesive on the cover plate sometimes its visible. Usually red or blue adhesive on ones I have seen. I would crimp it before painting. It actually depends on the maker of machinery, you make the choice upon buying it, if you even care. Of course...

Must have been some nice machinery they bought from Castrol to ship it to China and start production. I'm sure equipment can be made and bought in China, but then they all seem to have the round unpainted crimp seam, while American has the smaller painted crimp. I want to think the small painted...

I read the link before posting it, thanks.

The painted seam suggests American, but saw this in FAQs. Don't know about the rest of their claims on performance. https://racing.costafilters.com/blog/where-costa-filters-are-made They will send high res. cut open pics to anyone they say.

I would expect there is a catalog of filter medias or a custom order sheet to spec oil filter media. The Mobil 1 Whip City cut open shows some visible holes, not too much, but it fits that it is not the same as PG house brand and is specified. So Ford, Toyota, Honda, etc are going to order what...