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5.9 Dodge Magnum oil advice #4626185
01/06/18 05:35 PM
01/06/18 05:35 PM
Joined: Sep 2015
Posts: 884
California
mbacfp Offline OP
mbacfp  Offline OP
Joined: Sep 2015
Posts: 884
California
2003 Dodge Durango 5.9...94,500 miles. Concerned about oil consumption. 1.5 quarts every 3,000 miles or so. Using Pennzoil Platinum 10w-30, yearly OCI. Should I try a high mileage 10w-30 or go straight to a 5w-40. No smoke, leaks, etc. Interested in combating oil consumption. Any advice on this motor.

Last edited by mbacfp; 01/06/18 05:35 PM.

2014 F-550 PSD..........M1 Delvac ESP 5w-40 + OEM
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Re: 5.9 Dodge Magnum oil advice [Re: mbacfp] #4626192
01/06/18 05:43 PM
01/06/18 05:43 PM
Joined: Aug 2017
Posts: 663
MN
14Accent Offline
14Accent  Offline
Joined: Aug 2017
Posts: 663
MN
It's a Magnum... they all burn oil. Valve stem seals usually.

A HM 10W-30 might help, but the seals are probably rock hard at this point and no amount of additive will soften them much. However that's a pretty easy engine to work on and valve stem seals can be replaced even with the heads on.


2013 Chevrolet Volt - Saves enough in fuel to pay for itself!

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Re: 5.9 Dodge Magnum oil advice [Re: mbacfp] #4626195
01/06/18 05:48 PM
01/06/18 05:48 PM
Joined: Sep 2015
Posts: 884
California
mbacfp Offline OP
mbacfp  Offline OP
Joined: Sep 2015
Posts: 884
California
Oh ok. Thanks. Thinking Plenum...but none of the symptoms other than oil consumption. Appreciate the info.


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: 5.9 Dodge Magnum oil advice [Re: mbacfp] #4626452
01/06/18 10:00 PM
01/06/18 10:00 PM
Joined: Dec 2017
Posts: 461
Indy
69Torino Online sleepy
69Torino  Online Sleepy
Joined: Dec 2017
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Indy
Take the air inlet off the throttle body, open the throttle by hand and shine a flashlight down into the plenum. You may see a puddle of oil in the bottom of the intake. If you do, the paper gasket for the plenum cover on the bottom of the intake has failed and gotten sucked in by engine vacuum. Best solution is to reseal it using oil compatible RTV sealant like Permatex Ultra Gray. Ditch the paper gasket all together. Intake manifold will have to be removed for this repair.


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Re: 5.9 Dodge Magnum oil advice [Re: 69Torino] #4626512
01/06/18 11:28 PM
01/06/18 11:28 PM
Joined: Aug 2017
Posts: 663
MN
14Accent Offline
14Accent  Offline
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Posts: 663
MN
Originally Posted By: 69Torino
Take the air inlet off the throttle body, open the throttle by hand and shine a flashlight down into the plenum. You may see a puddle of oil in the bottom of the intake. If you do, the paper gasket for the plenum cover on the bottom of the intake has failed and gotten sucked in by engine vacuum. Best solution is to reseal it using oil compatible RTV sealant like Permatex Ultra Gray. Ditch the paper gasket all together. Intake manifold will have to be removed for this repair.


Not bad advice either. Doesn't hurt to check, and it doesn't take long.


2013 Chevrolet Volt - Saves enough in fuel to pay for itself!

2003 Cadillac Seville STS - The winter "beater", it uses the Volt's fuel
Re: 5.9 Dodge Magnum oil advice [Re: mbacfp] #4626592
01/07/18 05:04 AM
01/07/18 05:04 AM
Joined: Mar 2007
Posts: 1,687
NE
VNTS Offline
VNTS  Offline
Joined: Mar 2007
Posts: 1,687
NE
If you have maintained it, it is probably the plenum, but the valve cover gaskets can leak.

I run 5w-30 PUP in mine but any synthetic should work well.

Re: 5.9 Dodge Magnum oil advice [Re: mbacfp] #4627127
01/07/18 03:57 PM
01/07/18 03:57 PM
Joined: Jul 2008
Posts: 286
Bucks, PA
zfasts03 Offline
zfasts03  Offline
Joined: Jul 2008
Posts: 286
Bucks, PA
Wow! That is clean inside!


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-Amsoil 5w-30 SS
07 Honda Accord 2.4L
-Amsoil 5w-20 SS
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-M1 0w-20, XG10575
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- Amsoil 0w-30 SS, TRD filter
Re: 5.9 Dodge Magnum oil advice [Re: mbacfp] #4627182
01/07/18 04:46 PM
01/07/18 04:46 PM
Joined: Mar 2007
Posts: 1,687
NE
VNTS Offline
VNTS  Offline
Joined: Mar 2007
Posts: 1,687
NE
Had about70k at the time with mostly Amsoil xw-30 sig series changed yearly. Have some PUP from cheap deals and been running that recently.

5.9 are easy on oil,valve cover was leaking so replaced it, keep an eye on the plenum, have a Hughes kit ready if it needs it but it doesnt use any oil.

Last edited by VNTS; 01/07/18 04:48 PM.
Re: 5.9 Dodge Magnum oil advice [Re: mbacfp] #4627210
01/07/18 05:14 PM
01/07/18 05:14 PM
Joined: Sep 2015
Posts: 884
California
mbacfp Offline OP
mbacfp  Offline OP
Joined: Sep 2015
Posts: 884
California
Thanks VNTS. WI'll look into those things.


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: 5.9 Dodge Magnum oil advice [Re: mbacfp] #4627279
01/07/18 06:09 PM
01/07/18 06:09 PM
Joined: May 2013
Posts: 681
Florida
SilverSnake Offline
SilverSnake  Offline
Joined: May 2013
Posts: 681
Florida
Had the 5.9L in my 2001 Ram 2500 which I bought new and had for 14 years. Best truck I every owned. Engine flawless. No leaks, smoke or any other issues ever. Ran M1 10W-30 for fist 75K miles and then M1 HM 10W-30 until I traded it at about 140K miles. Oil and filter changed every 3,000 miles religiously. Used about 1/2 quart between OCIs. I would give M1 HM a try. Can't hurt.

Last edited by SilverSnake; 01/07/18 06:10 PM.

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