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Filter bypass pressure concerns #5382970 03/22/20 01:24 PM
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Govtman Offline OP
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I have a 2019 Ram 5.7 hemi . Comes with MO-339 with 12lb bypass. I dont like the little filter and am thinking of using Wix 7899 or MO-899 but it has a 16-18lb bypass. I will be using 5w20 PP and not conventional oil. Is there any concern with start up flow with 16-18lb vs 12lb bypass. I know the PP will flow much better cold vs conventional so should i not be worried about bypass pressure difference? Secondly does anyone have the filter efficiency of Mopar filters? Seems no matter where i look their rating is not listed.

Re: Filter bypass pressure concerns [Re: Govtman] #5382989 03/22/20 01:54 PM
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Lubener Offline
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I wouldn't deviate sizes, filter characteristics and risk any warranty issues if you ever had a problem..

Last edited by Lubener; 03/22/20 01:56 PM.

The "thinking" man's friend.
Re: Filter bypass pressure concerns [Re: Govtman] #5383005 03/22/20 02:18 PM
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Ignatius Offline
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People concerned about an oil filter bypass spec get concerned when it goes down not up.


2018 Subaru Outback Limited - 95,000 miles
2018 Subaru Outback Premium - 37,000 miles
2012 Hyundai Accent GLS - 103,000 miles
2005 Dodge Sprinter 3500 - 168,000 miles
Re: Filter bypass pressure concerns [Re: Ignatius] #5383021 03/22/20 02:51 PM
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Govtman Offline OP
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I was thinking of oil starvation upon start-up. I knew the early hemis used the 899 and then went to the 339 with lower bypass pressure. Wondered if it had to do with trying to address the startup knock or possible damage that may contribute to hemi tic.

Re: Filter bypass pressure concerns [Re: Govtman] #5383023 03/22/20 02:51 PM
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ZeeOSix Offline
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Does this 2019 Ram 5.7 hemi have a variable (computer controlled) oil pump?

Re: Filter bypass pressure concerns [Re: Govtman] #5383027 03/22/20 02:55 PM
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Timmastertech Offline
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You dont have enough room to get an 899 filter in there around the power steering rack. That is why chrysler went from the large filter to the small filter on that application. Its hard enough getting the small filter out without making a huge mess

Re: Filter bypass pressure concerns [Re: Govtman] #5383029 03/22/20 02:56 PM
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Govtman Offline OP
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I may just use the MO-339 or Wix 57060 and change filter at 5k and oil/filter at 10k. Depending on if i can find out which is better at filtration.

Re: Filter bypass pressure concerns [Re: ZeeOSix] #5383030 03/22/20 02:58 PM
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Govtman Offline OP
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Yes has VVT

Last edited by Govtman; 03/22/20 03:06 PM.
Re: Filter bypass pressure concerns [Re: Timmastertech] #5383038 03/22/20 03:09 PM
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Govtman Offline OP
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Originally Posted by Timmastertech
You dont have enough room to get an 899 filter in there around the power steering rack. That is why chrysler went from the large filter to the small filter on that application. Its hard enough getting the small filter out without making a huge mess


Thank you. I thought the clearance was due to a movement of steering parts, never realized clearance was just getting filter in place.

Re: Filter bypass pressure concerns [Re: Govtman] #5383095 03/22/20 04:43 PM
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ZeeOSix Offline
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Originally Posted by Govtman
Yes has VVT


That's not the same as a variable displacement oil pump.

Re: Filter bypass pressure concerns [Re: Govtman] #5383114 03/22/20 04:59 PM
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bullwinkle Offline
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I would stick with the factory size & not start experimenting until the warranty is up, don't want to give FCA an excuse to void a warranty. Hemi tick is usually roller lifter bearing failure, not sure the filter would have a big effect, and a smaller filter would likely build pressure more quickly, a good thing.


06 Ram 3500 CTD 4X4(FG Venturi), 89 F-450 7.3, 98 XJ 4.0(XG8A), 05 xB(XG3600), 18 Transit 3.7 (MC), 03 Merc Grand Marquis 4.6 2V(XG2), 11 Express 3500 6.0 (Fram PH10060 for now)
Re: Filter bypass pressure concerns [Re: Govtman] #5383153 03/22/20 05:51 PM
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oldhp Offline
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Put a FRAM XG10060 on it.


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