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5.9l Dodge Magnum oil consumption question #4440530
06/24/17 06:46 PM
06/24/17 06:46 PM
Joined: Sep 2015
Posts: 873
California
mbacfp Offline OP
mbacfp  Offline OP
Joined: Sep 2015
Posts: 873
California
Have a 2003 Dodge Durango with 5.9L. Currently using Pennzoil Platinum 10w-30, yearly OCI...usually 1,000-2,500 miles a year. Got back from a Grand Canyon trip (we tow Durango behind motorhome). I want to say we put 400-500 miles driving around. I changed oil before trip and noticed during trip is was half way into safe on dipstick. Had to add a little less than a quart (just to be safe). Never noticed oil consumption like that before...not leaks no smoke, etc...been a great truck. Is there a better oil to deal with oil consumption on this motor? Appreciate the help.

Last edited by mbacfp; 06/24/17 06:48 PM.

2014 F-550 PSD..........M1 Delvac ESP 5w-40 + OEM
2018 Dodge Charger SRT Hellcat
2012 Toyota Sienna LTD 3.5L V6
2003 Dodge Durango R/T 4x4 5.9L V8
Re: 5.9l Dodge Magnum oil consumption question [Re: mbacfp] #4440532
06/24/17 06:47 PM
06/24/17 06:47 PM
Joined: Sep 2015
Posts: 873
California
mbacfp Offline OP
mbacfp  Offline OP
Joined: Sep 2015
Posts: 873
California
Mileage is 92,200 on motor. Thanks.


2014 F-550 PSD..........M1 Delvac ESP 5w-40 + OEM
2018 Dodge Charger SRT Hellcat
2012 Toyota Sienna LTD 3.5L V6
2003 Dodge Durango R/T 4x4 5.9L V8
Re: 5.9l Dodge Magnum oil consumption question [Re: mbacfp] #4440543
06/24/17 07:12 PM
06/24/17 07:12 PM
Joined: Nov 2016
Posts: 1,278
WI
HoosierJeeper Offline
HoosierJeeper  Offline
Joined: Nov 2016
Posts: 1,278
WI
When was the last time the PCV valve was changed? I'd throw a new Mopar one in it and see what that does. Aftermarket ones are junky.

I'm not all that familiar with that engine and what it likes for oil, but any high mileage oil is a great place to start. Valvoline Maxlife, Pennzoil HM...plus many others, can't really go wrong. I think synthetic is overkill for your app though, under 3000 miles a year? If you're going to change it once a year, just use conventional or a synthetic blend.

Last edited by HoosierJeeper; 06/24/17 07:12 PM.

15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
Re: 5.9l Dodge Magnum oil consumption question [Re: mbacfp] #4440545
06/24/17 07:14 PM
06/24/17 07:14 PM
Joined: Jun 2017
Posts: 147
Waco, Tx.
Syntheticuser Offline
Syntheticuser  Offline
Joined: Jun 2017
Posts: 147
Waco, Tx.
I would stick to the same oil 2 or more times to see if it stops. I would replace the PCV valve with a factory Chrysler one. Don't use an aftermarket one. I have found them to cause more issues. Also, if it is easy, take the PCV plumbing hose off and spray it out with carb cleaner to get the gunk and buildup out of it should it have any.
Oh and get it up to temp and floor it for a few seconds a few times to clear it out. Carbon , sticky rings stuff like that. If do a few runs from 40mph to 75mph.

Re: 5.9l Dodge Magnum oil consumption question [Re: mbacfp] #4440546
06/24/17 07:19 PM
06/24/17 07:19 PM
Joined: Sep 2015
Posts: 873
California
mbacfp Offline OP
mbacfp  Offline OP
Joined: Sep 2015
Posts: 873
California
Not sure on when it was changed. I will change it and see what happens. Thanks to all again. Regarding high mileage oil, does the seal conditioners hurt in the long run? Or is that another myth? Thanks.


2014 F-550 PSD..........M1 Delvac ESP 5w-40 + OEM
2018 Dodge Charger SRT Hellcat
2012 Toyota Sienna LTD 3.5L V6
2003 Dodge Durango R/T 4x4 5.9L V8
Re: 5.9l Dodge Magnum oil consumption question [Re: mbacfp] #4440550
06/24/17 07:28 PM
06/24/17 07:28 PM
Joined: Nov 2008
Posts: 3,157
Oshawa, Ontario Canada
JC1 Offline
JC1  Offline
Joined: Nov 2008
Posts: 3,157
Oshawa, Ontario Canada
Originally Posted By: mbacfp
Not sure on when it was changed. I will change it and see what happens. Thanks to all again. Regarding high mileage oil, does the seal conditioners hurt in the long run? Or is that another myth? Thanks.


The seal conditioners won't hurt anything.


2015 Grand Caravan SXT Plus 5w-20 PPPP/Fram Ultra Filter
1997 Honda Civic CX 5w-30 Shell Conventional/Fram Ultra Filter
Re: 5.9l Dodge Magnum oil consumption question [Re: mbacfp] #4440559
06/24/17 07:46 PM
06/24/17 07:46 PM
Joined: Apr 2017
Posts: 15
Florida
bbartow Offline
bbartow  Offline
Joined: Apr 2017
Posts: 15
Florida
Blown plenum gasket would be a good place to start. Notorious on the magnum motors.

Re: 5.9l Dodge Magnum oil consumption question [Re: bbartow] #4440571
06/24/17 08:03 PM
06/24/17 08:03 PM
Joined: Jun 2010
Posts: 591
Florida
Dumc87 Offline
Dumc87  Offline
Joined: Jun 2010
Posts: 591
Florida
Originally Posted By: bbartow
Blown plenum gasket would be a good place to start. Notorious on the magnum motors.


Veryyyyy common on Magnum blocks. Shine a flash light down into the intake with the throttle body open. If you see oil pooling, that's a sure sign your intake gasket is blown.

If you plan on keeping the Durango for a long period of time, get an aluminum plate like the Hughes plate and throw in a FelPro intake gasket to mate between the plate and the intake.

Otherwise just fix it however as cheaply as you prefer laugh


'90 Z32 - PP HM 10w30
'98 ZJ - PYB HM 10w40
'02 G20 - QS UD 5w30
'09 Matrix - QS UD 0w20
Re: 5.9l Dodge Magnum oil consumption question [Re: Dumc87] #4440720
06/24/17 11:04 PM
06/24/17 11:04 PM
Joined: Dec 2016
Posts: 279
Sav ga
NStuart Offline
NStuart  Offline
Joined: Dec 2016
Posts: 279
Sav ga
Same engine 85k in my truck, no matter what oil I use I lose 1at per 5k, I change it when it gets a at low, I have 2 very small leaks one being front seal,the other a valve cover


Detroit14l 1m75k mi bp schaffer9k 30k oil
96 ram 5.9 gas 80k built tranny 5k m1
85 cj7 4.2 performance build. Schaeffer 9000
08 cbr600rr graffiti. T6
08 husky sm610 t6
Re: 5.9l Dodge Magnum oil consumption question [Re: NStuart] #4441167
06/25/17 02:12 PM
06/25/17 02:12 PM
Joined: Jun 2010
Posts: 591
Florida
Dumc87 Offline
Dumc87  Offline
Joined: Jun 2010
Posts: 591
Florida
Originally Posted By: NStuart
Same engine 85k in my truck, no matter what oil I use I lose 1at per 5k, I change it when it gets a at low, I have 2 very small leaks one being front seal,the other a valve cover


FelPro makes a really good valve cover gasket. Permaseal, or something like that. Easy fix.


'90 Z32 - PP HM 10w30
'98 ZJ - PYB HM 10w40
'02 G20 - QS UD 5w30
'09 Matrix - QS UD 0w20

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