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  #11  
Old 30th May 2019
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Default

Mahle was OC21, and i may have been a bit harsh on it. At least it has top by-pass and
a fair bit of filter medium.
What does surprise me is how small the gap is between filter and casing on normal cannister types. If they have a bottom by-pass then surely most of what ever the filter has managed to catch, will be washed off at cold start ups.
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  #12  
Old 30th May 2019
rocketmangb rocketmangb is offline
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Bypass should not be open on a cold start
But yes,bottom bypass is terrible !!
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  #13  
Old 16th May 2021
ivanford ivanford is offline
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Anyone know the difference / which is the best between Mahle OC21 and OC21OF as both are listed as suitable for the Sportster engine.
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  #14  
Old 15th May 2022
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Best Oil Filter Testing I've Seen, So Far This was uploaded on youtube today. *Fortnine* tests a lot of mc stuff.

https://youtu.be/4rgi9B8BKUE
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  #15  
Old 19th May 2022
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Default Great Post Toejam503!

Great Post Toejam503,

I just watched the FortNine oil filter shootout. Great info and a real-world test.

Reassuring as i just bought a bunch of the standard long oil filters from DK.

I'm a detail freak so I'll be doing early oil changes as a matter of course. I should be doing the best I can for the engine based on that.

Again, great post and thanks for putting that up for the rset of us.

Best regards,

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  #16  
Old 19th May 2022
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The fact that he pointed out that a paper oil filter also absorbs damaging moisture was a plus for me.
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  #17  
Old 20th May 2022
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Default DITTO - What Toejam503 said!

DITTO - What Toejam503 said!
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