Why the smaller oil Filter?

[DonAvg]

Anyone know why the Jeep 392 oil filter is smaller than the Hellcat 392 oil filter?

 

[hardhat]

Supposedly some 6.4 engines use the smaller filter due to clearance issues. Don't really know why they went small on our 392's. The bigger filters fit fine. I bought a bunch of filters and cut them open. If you are staying with small filter (339 form factor) I would recommend Wix 57060XP. If you want to go with the larger (899 form factor) I would use either Fram XG10060 or Wix 57899XP. The OEM filters I cut apart were not nearly as nice as these. I was not able to get a mo-041 to dissect. They are backordered.

Oil filter comparison

So after watching Youtube videos and it being clear as mud, I decided to buy a bunch of 392 oil filters, cut them apart and take a look. I like the Fram XG10060 or Wix 57060XP (in small 339 form factor) or Wix 57899XP (in large 899/041 form factor). Wix 57899XP is winner for me. I could not...

www.jeep392.com

 

[YukonCornelius]

Thanks @hardhat ! Bookmarked for that first one (one day)

 

[DonAvg]

I was at Walmart looking through the oil filter reference book seeking a filter for my 2022 392. The book didn't have 2021 or 2022 JLUR 392 data. So I looked up the Hellcat 392 because it's the same engine. Right? So I find that the Hellcat 392 takes the Fram XG2. When I looked at the XG2, it looked bigger than what my 392 has. Then I looked up my JLUR 392 filter data using the Fram search tool and it pointed me to the 10060 size filter which is significantly smaller. So I bought them both and went back to my garage.

I drained the oil and took the factory oil filter off and it was the size of the 10060 filter. When I looked at the block where the filter goes, I noticed that it's machined for a larger filter. So naturally I tried to see if the larger Fram XG2 fit. Well it fit like a glove. I also noticed that the Jeep's frame has an indent strategically placed to give the larger oil filter the clearance it needs. Interesting, right?

So now I'm wondering; Why the smaller oil filter? Why does the Jeep 392 have a smaller oil filter than the Hellcat 392?

Doesn't the 392 in our Rubicons deserve the same filter that the Hellcat 392 has?
And from the looks of machining on the block, isn't that larger XG2 size filter the one that the engine was designed to use?

 

[392Stinger]

I was at Walmart looking through the oil filter reference book seeking a filter for my 2022 392. The book didn't have 2021 or 2022 JLUR 392 data. So I looked up the Hellcat 392 because it's the same engine. Right? So I find that it takes the Fram XG2. When I looked at it, it looked bigger than what my 392 has. Then I looked it up on line and the Fram search tool pointed me to the 10060 size filter. So I bought them both and went back to my garage.

I drained the oil and took the factory oil filter off and it was the size of the 10060 filter. When I looked at the block where the filter goes, I noticed that it's machined for a larger filter. So naturally I tried to see if the Fram XG2 fit. Well it fit like a glove. The Jeep's frame has an indent strategically placed to give the larger oil filter the clearance it needs.

So now I'm wondering; Why the smaller oil filter?

Doesn't the 392 in our Rubicons deserve the same filter that the Hellcat 392 has?
And from the looks of machining on the block, isn't that larger XG2 size filter the one that the engine was designed to use?

Not trying to be a smart A$$ but I worry more about a quality filter as others have stated above WIX or similar than I am about the size difference. I don’t think the engineers that developed our vehicles had issue with a smaller filter, just bypass valves and filter media being the priority. I’m no expert but I am confident that it’s been tried and tested prior to building these rigs.
Just my 2 cents.

 

[DonAvg]

Not trying to be a smart A$$ but I worry more about a quality filter as others have stated above WIX or similar than I am about the size difference. I don’t think the engineers that developed our vehicles had issue with a smaller filter, just bypass valves and filter media being the priority. I’m no expert but I am confident that it’s been tried and tested prior to building these rigs.
Just my 2 cents.

I'm thinking the same thing. Just looking for other ideas. Love the license plate!

 

[Shortcut]

I'm thinking the same thing. Just looking for other ideas. Love the license plate!

What I'm getting from various sources is that the oil filter is in a vulnerable spot on the Jeep 392 because of a suspension componant that could collide with it in some circumstances. That is why the filter is smaller and angeled forward slightly by an adapter not used in other 392 applications.

 

[veddersbetter]

I was at Walmart looking through the oil filter reference book seeking a filter for my 2022 392. The book didn't have 2021 or 2022 JLUR 392 data. So I looked up the Hellcat 392 because it's the same engine. Right? So I find that the Hellcat 392 takes the Fram XG2. When I looked at the XG2, it looked bigger than what my 392 has. Then I looked up my JLUR 392 filter data using the Fram search tool and it pointed me to the 10060 size filter which is significantly smaller. So I bought them both and went back to my garage.

I drained the oil and took the factory oil filter off and it was the size of the 10060 filter. When I looked at the block where the filter goes, I noticed that it's machined for a larger filter. So naturally I tried to see if the larger Fram XG2 fit. Well it fit like a glove. I also noticed that the Jeep's frame has an indent strategically placed to give the larger oil filter the clearance it needs. Interesting, right?

So now I'm wondering; Why the smaller oil filter? Why does the Jeep 392 have a smaller oil filter than the Hellcat 392?

Doesn't the 392 in our Rubicons deserve the same filter that the Hellcat 392 has?
And from the looks of machining on the block, isn't that larger XG2 size filter the one that the engine was designed to use?

Just to clarify.. the Hellcat does not have a 392. It is a 6.2L vs a 6.4L.
Scatpak would be the 392 although the filter on the Hellcat may be the same.

 

[hardhat]

What I'm getting from various sources is that the oil filter is in a vulnerable spot on the Jeep 392 because of a suspension componant that could collide with it in some circumstances. That is why the filter is smaller and angeled forward slightly by an adapter not used in other 392 applications.

What suspension component? I couldn't see anything under there that looked like it could contact the oil filter

 

[Shortcut]

What suspension component? I couldn't see anything under there that looked like it could contact the oil filter

The upper right axle control arm mount on top of the front axle is close to the oil filter. Removing the oil filter adapter from the block and installing a full size 392/6.4 oil filter would put the oil filter even closer to the control arm mount. I don't know how much closer the control arm mount would come to a full size oil filter mounted directly to the block as it moves up and down under normal operation especially when the sway bar is disengaged when off roading but would crtainly be interested to hear from anyone that makes that move and the results that are obtained.