mx5cartalk.com

Excuse the voice and poor quality video.
I hope I understand and have explained oil filter operation correctly.
Let the flaming begin.

https://youtu.be/_6YUNRAVax0

Thanks!

While I usually buy Ryco, I'm interested to see how some of the other brands compare - like Sakura and Wesfil.

Sakura -V- Ryco
https://www.youtube.com/watch?v=iSBK5Y6-c68&t=193s

Are Cliffs Notes available?

Code4 wrote:Sakura -V- Ryco
https://www.youtube.com/watch?v=iSBK5Y6-c68&t=193s

Thanks for that.

I've been using Sakuras for a few years now with no problems on my BP motor. I did swap from the standard sized Ryco Z79A/Sakura C1032 to the much bigger Ryco Z56B/Sakura C1031 size. Apart from the increased filter area they are usually cheaper - go figure. The bigger filter does foul the manifold support brace. If you want to keep the brace then you need to attack it with an angle grinder to cut a small segment out of the back of it.

The first video shows the oem filter having a lot higher bypass pressure spring than the 2 Ryco's.
But the oem design is totally different, & although the video is not clear, I think the oil pressure acts on a much greater area.
With the 2 Ryco's, the pressure acts only on the area that you push with the screwdriver. With the oem, the area you push with the screwdriver is well proud of the actual opening passage, & I'd say it's not the only area that the oil acts on. If that's the case, we don't know which one opens at the highest pressure.

From my research, if you change your oil and filter religiously, ultimately it's the oil that counts more than the filter.
If your filter is catching visible (metallic) debris then your engine is on the way out unless something has been dropped into it.
I found this after my 200km service (with a generic workshop oil filter fitted). The magnetic sump plug looked like a mushroom at the first (post service) oil change. I hope this was just dirty workshop practise as it was all good before and since.

Good oil filters seem to be rated at 20-30 microns. A human hair is 60 microns.

For me, I was searching for by-pass pressure. This is largely controlled by oil viscosity and oil pressure.
Clogged filter medium = high pressure differential. Cold oil = thick oil = high pressure differential. High revs = high pressure = high pressure differential, the bypass opens and doesn't starve the engine of oil.
Correct me if I'm wrong.

In my oil filter dissection, the standard Ryco looked like it would open the earliest letting oil bypass the filter medium and 'feeding' the engine lubricant. Who knows when this occurs without being able to measure it. I'm assuming lower in the rev range, leaving filtration available only at low(er) revs.

The Ryco ST, however, would open later with its stiffer spring allowing longer filtration of oil till the bypass opens.

The OEM filter, B6Y1-14-302A filters oil for a much longer interval before opening and again I assume this occurs at much higher revs than the Rycos allowing us to exploit the engine more without losing filtration.

RS2000 wrote:The first video shows the oem filter having a lot higher bypass pressure spring than the 2 Ryco's.
But the oem design is totally different, & although the video is not clear, I think the oil pressure acts on a much greater area.
With the 2 Ryco's, the pressure acts only on the area that you push with the screwdriver. With the oem, the area you push with the screwdriver is well proud of the actual opening passage, & I'd say it's not the only area that the oil acts on. If that's the case, we don't know which one opens at the highest pressure.

Well spotted sir, I dip me lid to you. More research required if I can find the figures out there.

Code4 wrote:The OEM filter, B6Y1-14-302A filters oil for a much longer interval before opening

What I'm saying is you don't know that. Determine the spring force & area the oil acts on, & you'll have some idea.
Pressure = force/area

Sorry Code4, I didn't see your last post when replying to your second last post
Cheers

No worries. Will post another video today and open the OEM filter material.

Part II
https://www.youtube.com/watch?v=Z210pI51TiI

Part III
https://www.youtube.com/watch?v=iA1_tQf6eLM

thanks for the vids. so answer is go genuine?

Well OEM is a proven option.

The generic Ryco clearly lets the bypass open earlier than the ST variant so if filtration at max rpm is your goal its a no.

Any filter will work for a DD. Regular oil changes are more important.

There are bulk buy deals on ebay for OEM filters if you trust the vendor. Freight on single purchases for us out of town can be a bit much.

Cost for quality I'm keen to open a Mann filter.