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The Mahle OC11 will fit the Mille engine without problems.
Right now, I have a HiFlo HF153 on my Mille, but UFI 2310500 and Champion H301 will fit as well, and there are several other brands that will fit too.

No, it doesn't fit, my spigot is M16x1.5 but the Mahle OC11 that I've got has a 3/4`-16UNF-2B thread.
See here.........
https://www.oljemagasinet.se/index.php? ... hle%20oc11

Or has Mahle OC11 got several different threads?

Best regards

Hedton

Perhaps someone changed it on your Mille..??
Otherwise, all the above mentioned filters will fit the Mille without problems at all.

Do you know if yours is M16x1.5 or the 3/4`-16UNF-2B thread?

Best regards

Hedton

No I don't, but again, all the above mentioned filters fits my stock 1985 Mille engine without problems.
If they don't fit yours, somebody screwed something up I guess...

Just buy this Mahle OC11 filter ( or one of the others), and you will notice that it will fit your Mille....
Don't make it harder than it is....

I bought this.......

http://www.ebay.co.uk/itm/AN-8-AN8-BLAC ... xy5jxSbx-F

Ebayitemnr:302337834959


With a little machining you can fit a 3/4 UNC filter such as the OC11.
I will take off the anodizing with 5 % of plumbing soda.
Hope this information is useful.

I've modified the spigot i bought.
And the Oc11 filter will now fit.

Somebody mashed up with your engine in the past, normaly you don't need that device.
Again, any filter for a modern Duc will fit the Mille engine without problems.

The filter is called w77 for the thread 3/4"-16UNF-2B.
https://www.google.com/search?q=w77+oil ... CAw&uact=5