Well, I did it... I've convinced myself that the Donaldson DBL7483 is the way to go for Duramax oil filtration. It wasn't easy, but after viewing nearly ever oil filter made for the Dmax and all the lies and inconsistencies in these "consumer grade" products... I made the jump to professional grade products and ended up with the Donaldson (over the CAT filter)... and here it is.
It comes wrapped in a heavy plastic wrap, much thicker than the consumer grade wraps. Cutting this thing open was extremely difficult, even with my filter cutter! Once inside its very basic, just the element and the assembly parts. In ALL the Donalsdon literature they show the media as being "Blue", it was kind of a bummer to see it "White".
BUT... look at it closely.
It appears to be the same "terrycloth" looking filter media I found in the Amsoil EAO 52 oil filter, but at a slightly lower micron rating. Donaldson and Amsoil have a well known relationship, and it looks like this filter media is found in both products!
As for the element itself, it's constructed PERFECTLY. Not a single pleat is out of place, no glue , no rust, no mess.... It borrows those 'Locating Tabs" as seen in the Fram filters to locate the element perfectly in the can, and has a louvered center core to protect the element media from tears or abrasion. There is no way to improve it !
The media is synthetic which offers the highest possible flow rate while being able to catch the smallest of particles.
The micron rating is 10 Microns at 90% and 15 Microns at 99.9%.Outstanding!
The huge media area combined with the high flow means the bypass valve is not needed. 100% of the oil sent to the filter gets filtered...100% of the time. This played a big factor in my decision.
Installation is slightly different from my LLY. The LML filter mount nipple has a hex portion made into it. Simply unscrew the original nipple with a 15/16" socket, and screw in the new one. The swap takes 30 seconds...
I'm going to run this deal through TWO DIC countdowns ( aprox 15,000 miles) and send the oil in to Blackstone for a check up. I know the oil should be good, and with the huge area of the filter, I'm pretty sure it can make it too. After swapping filters, I needed to add 2.5 quarts of oil to bring it back to FULL. Adding volume to system is always a good thing.
So there ya' go..... Make your own decisions based off all of this. For anyone thinking about doing one of those Amsoil dual filter mounts ( 1 full flow, 1 bypass) ..this Donaldson deal offers nearly all the benefits for a fraction of the cost. For anyone who wants to keep a OEM style filter like the Baldwin... that's great too, especially if your still under warranty.
The mounting nipple is $16 on Ebay, and the filter is available everywhere for about $18. ( I put the OEM nipple in my glovebox, in case I'm in the middle of nowhere and need to swap it back)