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#4654823 - 02/03/18 12:08 PM HM oil to reduce oil consumption
zrxkawboy Offline


Registered: 11/30/04
Posts: 1761
Loc: SD
I'd like to hear experiences about HM oil reducing consumption. It seems that most discussions are about reducing leaks.

The vehicle in question is an '05 Chrysler T&C with the infamous oil-burning 3.8. Bought it with 70k and it now has 146k. It has always burned about a quart every 1500. This has been pretty consistent since we've owned it. Conklin Convoy 5W30, Valvoline Maxlife 5W30, Mobil 1 HM 5W30, and Mobil 1 0W40 have all been used and consumption has been similar with all (each has been run for more than 1 OCI, and yes, more than 1 means 2 or more wink ).

The PCV valve and hose have been replaced with OEM, with no improvement.

I'm not expecting a cure, but any improvement would be welcome. I'm thinking of trying Pennzoil HM or Castrol HM, leaning toward the Castrol as they claim it's less harmful to the cat, which I've already replaced once. Thanks in advance for any input.


Edited by zrxkawboy (02/03/18 12:10 PM)
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"Think of all the Ford owners who will someday want an automobile." John Dodge


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#4654826 - 02/03/18 12:12 PM Re: HM oil to reduce oil consumption [Re: zrxkawboy]
CT8 Offline


Registered: 10/09/14
Posts: 11020
Loc: Idaho
It probably would depend on the cause of the problem.
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#4654827 - 02/03/18 12:13 PM Re: HM oil to reduce oil consumption [Re: zrxkawboy]
Quattro Pete Offline


Registered: 10/30/02
Posts: 35897
Loc: Great Lakes
I've been running Castrol Edge HM 10w-40 in my 530i for the past 12K miles or so. So far, I've noticed no improvement in either leak reduction or consumption.
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#4654830 - 02/03/18 12:15 PM Re: HM oil to reduce oil consumption [Re: zrxkawboy]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2388
Loc: Balearic Islands , Spain
Band aid fix.
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1975 Ford Capri II Ghia 3000 V6, - Valvoline VR1 20W-50
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Shell Rimula R4X 15W-40 HDEO.

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#4654833 - 02/03/18 12:19 PM Re: HM oil to reduce oil consumption [Re: FordCapriDriver]
zrxkawboy Offline


Registered: 11/30/04
Posts: 1761
Loc: SD
Originally Posted By: FordCapriDriver
Band aid fix.


Agreed. Like I said, any improvement would be welcome. I'm not gonna rebuild the engine in a 13yo minivan.
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"Think of all the Ford owners who will someday want an automobile." John Dodge


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#4654836 - 02/03/18 12:26 PM Re: HM oil to reduce oil consumption [Re: zrxkawboy]
Dallas69 Offline


Registered: 02/11/14
Posts: 1664
Loc: Texas
Go up to 10-40 Maxlife
Have you tried LiquaMoly MOS?
If either of these don't work then I think u are out of luck.
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#4654850 - 02/03/18 12:41 PM Re: HM oil to reduce oil consumption [Re: zrxkawboy]
Snagglefoot Online   content


Registered: 12/31/17
Posts: 1774
Loc: Alberta
Quaker State Defy worked pretty well but it depends on how bad the seals are.

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#4654857 - 02/03/18 12:48 PM Re: HM oil to reduce oil consumption [Re: zrxkawboy]
Matagonka Offline


Registered: 02/03/15
Posts: 469
Loc: NC
Castrol tends to be a bit thicker. Run a 10w40 HM.

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#4654875 - 02/03/18 01:02 PM Re: HM oil to reduce oil consumption [Re: zrxkawboy]
zrxkawboy Offline


Registered: 11/30/04
Posts: 1761
Loc: SD
Thanks for the replies. I'm not going to a 10W40. Whatever I run, I want to be able to run year-round. We get many mornings well below 0 here. On New Year's morning, actual temp was -29F! So glad I had the day off work and could stay inside. I do park in a detached garage, but it's uninsulated/unheated, so start-up temps are only a little better than outside temp.

I tried the 0W40 to see what a 40 wt would do, and saw no difference.

Some have mentioned the cause of the consumption, and yes, that is definitely relevant. Unfortunately, I just can't say. After much reading over the years, the problem just seems to plague many of these 3.8 engines. Various explanations are floating around the internet: faulty ring design, oil rings installed upside-down on the assy line, etc. Honestly, I just don't know, but something along those lines seems to make sense, as the consumption has remained constant from 70k to 146k. I wish I knew if the problem had existed since new.

The van runs great, and we like it, so plan to keep it for a couple more years.
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"Think of all the Ford owners who will someday want an automobile." John Dodge


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#4654904 - 02/03/18 01:28 PM Re: HM oil to reduce oil consumption [Re: zrxkawboy]
Alex_V Offline


Registered: 04/10/16
Posts: 1156
Loc: Campbellsville, KY
My in-laws have a 2010 Caravan (237K now) that I've put multiple different kinds of HM oil in, with little effect on consumption. Maxlife red bottle 5w20, 5w30, full syn Maxlife 10w30, Castrol 0w40 - it burns a quart every 1,000-1,200 miles and they refuse to keep it topped up. When I'm the one topping it off I put whatever I need to get rid of in it, 5w20 to 10w40. When I initially put VML in it (190K?) consumption seemed to slow some, but it slowly started using more again so I think the 3.8's particular flaw that causes consumption is difficult to reverse or mitigate very well.
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#4654921 - 02/03/18 01:43 PM Re: HM oil to reduce oil consumption [Re: zrxkawboy]
Indydriver Offline


Registered: 03/20/11
Posts: 2156
Loc: Indiana
First fill of M1HM cut the oil consumption in half in my ‘07 Tahoe 5.3. It was very noticeable vs AFE and standard 5W-30 syn loads. I’m interested to see if subsequent consecutive fills cuts it even further.
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#4655004 - 02/03/18 03:16 PM Re: HM oil to reduce oil consumption [Re: zrxkawboy]
nickaluch Offline


Registered: 10/04/08
Posts: 381
Loc: Long Island,nassau county NY
Mobil 1 hm 10/40 definitely helped in my Geo prism
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2007 G6 beater.2012 E450 box truck. 2018 Chevy Traverse.2017 E450 box truck.2017 Chevy 3500 extend cargo van.

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#4655051 - 02/03/18 04:12 PM Re: HM oil to reduce oil consumption [Re: zrxkawboy]
otis24 Offline


Registered: 10/30/05
Posts: 1656
Loc: South Dakota
My first Grand Caravan, 2005 with a 3.8, is what brought me here. I purchased the van new. It woold use about 3/4ths of a quart in 1200 miles. In the case of this vehicle, simply switching to Pennzoil Platinum dropped consumption to about a half quart in 2k miles

My second van, a 2009 T&C with 3.8, was purchased used with 64k miles. This van used one quart per thosand miles l8ke clock work. At 500 miles, it was down a half quart. At 1000 miles, it was down one quart. Nothing helped. Not Mobil 1 full synthetic nor a Pennzoil Platinum full synthetic. Finally, I switched to Pennzoil Platinum High Mileage. Consumption was reduced dramatically.
_________________________
1991 Chevrolet K1500 (4.3, 4x4, 86k miles)

2016 Dodge Grand Caravan
(3.6 V6) 46500 miles

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#4655056 - 02/03/18 04:17 PM Re: HM oil to reduce oil consumption [Re: zrxkawboy]
otis24 Offline


Registered: 10/30/05
Posts: 1656
Loc: South Dakota
Mine was purchased new and yes, consumption was an issue from the get go.
_________________________
1991 Chevrolet K1500 (4.3, 4x4, 86k miles)

2016 Dodge Grand Caravan
(3.6 V6) 46500 miles

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#4655066 - 02/03/18 04:28 PM Re: HM oil to reduce oil consumption [Re: zrxkawboy]
JC1 Online   content


Registered: 11/29/08
Posts: 3019
Loc: Oshawa, Ontario Canada
Do the valve cover gaskets need replacing? I would check for leaks there.
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2015 Grand Caravan SXT Plus 5w-20 PPPP/Wix Filter
1997 Honda Civic CX 5w-30 PPPP/Mahle Filter

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