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#2461468 - 12/13/11 03:32 PM PYB, Moly content and high miles
Jimmy9190 Offline


Registered: 02/17/07
Posts: 2983
Loc: Clermont, Florida
This post is about the 2001 Dodge Dakota in my signature. It is a V6 3.9 liter with a 5 speed. It has 148,400 miles on it now. I have been using Quaker State conventional 10W30 for the last 18 months. Before that I used Napa and Carquest 10W30 conventional. Prior to that I used Valvoline White Bottle and also did a few OCI's with Maxlife 10W30.

All of the oils I have used did fine, as far as I can tell. I have an oil change coming up soon. I read on here that PYB has a lot more moly in it than other conventional oils. I have also read that the QS GB I have been using has more boron than other oils, and boron is said to be very good for engine seals.

My question is this: PYB obviously has a lot more moly. I wonder if a higher moly content is better for my higher-mileage V6? Would more moly help it run any better/smoother/with less noise? Does a higher moly content protect higher mileage engine internals any better than conventional oil with less moly?

I also read the PYB has a better TBN, and if I understand it correctly it basically means to me that the oil stays in its grade and provides good protection longer than other oils with a lower TBN.

I am not interested in using a "High Mileage" specific oil. I did not like the way my truck ran with Maxlife. It made my truck run a bit sluggish and caused a drop in my gas mileage. I am trying to keep my truck running its best and make it last as long as possible. I would make the switch to PYB if the higher moly and any other qualities would help.

I did do a search on my moly question, but all it really returned was posts about high mileage oils. I would appreciate your info here, or if there are posts I missed maybe if you guys have any links I can check out.

Thanks for your help on this.
_________________________
Jimmy9190
2001 Dodge Dakota, 3.9 V6, 5-speed manual, 170K
Peak 10W30, Fram PH16


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#2461477 - 12/13/11 03:37 PM Re: PYB, Moly content and high miles [Re: Jimmy9190]
Radman Offline


Registered: 11/24/10
Posts: 485
Loc: Detroit, Michigan
Addyguy would really be the one I would like to see reply to this post.
_________________________
2006 Maxima 120K M1-105, M1 0W40
2006 Sentra 90K M1-105, GTX 5W30
2010 Altima 20K M1-105, GTX 5W30
2013 Yamaha FZ1 1K PL1410, SRT5 15W40

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#2461488 - 12/13/11 03:45 PM Re: PYB, Moly content and high miles [Re: Jimmy9190]
chubbs1 Offline


Registered: 06/09/10
Posts: 4574
Loc: Merritt Island FL, USA
Don't worry about an oil that says "high Mileage" on it unless you have consumption issues.

Regular oil changes protect your engine. A quality oil helps more. Just use the PYB. Moly won't save your engine in and of itself.


Edited by chubbs1 (12/13/11 03:45 PM)
_________________________
'12 Charger SXT
QSUD 5w30 OEM filter

'12 Charger SXT
Edge FST EP 5w30 OEM (Mine;)

'11 Hyundai Sonata GLS
QSUD 5w20 OEM Filter


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#2461537 - 12/13/11 04:20 PM Re: PYB, Moly content and high miles [Re: Jimmy9190]
CATERHAM Offline


Registered: 11/18/05
Posts: 9351
Loc: Burlington, Ontario, Canada
Moly is an AW additive that tends to lower the CoF of an oil.
Will you be able to notice anything by switching to PYB? I doubt it?
_________________________
74 Lotus Europa 5W-50
86 Porsche 928S TGMO 0W-20 25%/M1 0W-40
96 BMW 328i Idemitsu/TGMO 0W-20 70%/M1 0W-40
94 Caterham 7 Sustina 0W-20 80%/0W-50

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#2461538 - 12/13/11 04:21 PM Re: PYB, Moly content and high miles [Re: Jimmy9190]
JRed Offline


Registered: 06/01/09
Posts: 1633
Loc: Virginia
TBN has nothing to do with an oil "Staying in grade" - TBN stands for "Total Base Number" and is related to an oil's ability to prevent becoming acidic, and is also related to an oil's overall detergency, or ability to keep contaminants in suspension.

PYB will, in general, stay in grade as long as an engine isn't hard on oil - which your Dodge isn't.
_________________________
06 Subaru Impreza WRX - Sold. The only mechanical thing I'll ever love.
07 Toyota Prius - Cheap synthetic and PureOne filters.

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#2461543 - 12/13/11 04:28 PM Re: PYB, Moly content and high miles [Re: Jimmy9190]
Jimmy9190 Offline


Registered: 02/17/07
Posts: 2983
Loc: Clermont, Florida
OK, thaks for the help and I apologize for my ignorance on the specs and characteristics of the components and compounds found in oil. I believe I will just use the remaining quarts of QSGB I have in my stash. QSGB has done a fine job in my engine so far. Thanks again.
_________________________
Jimmy9190
2001 Dodge Dakota, 3.9 V6, 5-speed manual, 170K
Peak 10W30, Fram PH16


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#2461960 - 12/14/11 01:26 AM Re: PYB, Moly content and high miles [Re: Jimmy9190]
Garak Offline


Registered: 12/05/09
Posts: 11092
Loc: Regina, Saskatchewan, Canada
Originally Posted By: Jimmy9190
I believe I will just use the remaining quarts of QSGB I have in my stash. QSGB has done a fine job in my engine so far. Thanks again.


I doubt you'll have any problems with QS. I've used many, many bottles of it over the years. I'd be using it in my G had I had enough in stock or had it gone on sale before the PYB did. I'm happy with either of them.
_________________________
Plain, simple Garak.

2008 Infiniti G37 coupe - Mobil Delvac 1 ESP 5w-40, Hastings LF113
1984 F-150 4.9L six - Quaker State GB 10w-30, Wix 51515

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#2462175 - 12/14/11 09:35 AM Re: PYB, Moly content and high miles [Re: Jimmy9190]
Jimmy9190 Offline


Registered: 02/17/07
Posts: 2983
Loc: Clermont, Florida
I do like how my truck runs on QS. Quiet and smooth and I get good gas mileage and power with it. Even at 148K my truck only burns about half a quart of oil about every 2500 miles.

I bought a few cases of QS back when AAP had it on sale with Purolator filters. This was back before all the rebate nonsense started. I am very satisfied with QS. I know it's not exactly the same as PYB but it is pretty darn close.

Thanks for your help.
_________________________
Jimmy9190
2001 Dodge Dakota, 3.9 V6, 5-speed manual, 170K
Peak 10W30, Fram PH16


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#2462259 - 12/14/11 11:10 AM Re: PYB, Moly content and high miles [Re: Jimmy9190]
Solarent Offline


Registered: 10/24/11
Posts: 441
Loc: Calgary AB
You original question is actually quite a common misconception about the effect of increased Moly in oils, and you aren't alone in reading this and hoping that increased moly would help your engine. The adage "if some is good, more must be better" typically doesn't apply with any oil technology - no matter what the prevailing opinions may tell you. This is demonstrated very well with the current thick vs thin debate because higher viscosity is proving not to be better in most instances.

As CATERHAM explained, Moly is an ANTIWEAR additive and has a tendency to lower the coefficient of friction (CoF) of an oil, and generally helps to improve fuel economy. Molybdenum compounds react in the oil environment to create a MoS2 film that functions well in reducing the CoF. However; due to the oxidative dehydration of the MoS2 during the oil life this function is difficult to sustain over extended oil drains. The use of anti-oxidents and the presence of ZDDP helps to improve the life of MoS2 layers; but overall you will see little change in the degree that moly functions by small increases in the Moly compound itself (the difference between PYB and QSGB for example), as even with Moly still in the oil, the effect it has due to dehydration is minimized over time.

I suspect that the use of Moly in grease applications and its relative cost effectiveness is part of the reason that it has become a byword in the industry for wear protection when the truth is that a balanced formula containing a blend of effective AW/EP additives is the answer to better protection.

Every engine is different and if you are happy with the results you are getting with QS then keep using it; both are good oils, I know that alot of BITOG users extol PYB over QS, but my experience puts them on a relatively level playing field.

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#2462320 - 12/14/11 12:14 PM Re: PYB, Moly content and high miles [Re: Jimmy9190]
Jimmy9190 Offline


Registered: 02/17/07
Posts: 2983
Loc: Clermont, Florida
Thanks for the info, Solarent. I am going to pick up some PYB and Puro Classics for my girlfriend's Honda Accord before the AAP sale ends this month. Her car will also need an oil change soon. Even with the rebate silliness, $14.00 for 5 quarts of PYB and a Puro Classic is still a very good deal. I may even stash a PYB oil change for my truck while I am at it.
_________________________
Jimmy9190
2001 Dodge Dakota, 3.9 V6, 5-speed manual, 170K
Peak 10W30, Fram PH16


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#2462388 - 12/14/11 01:24 PM Re: PYB, Moly content and high miles [Re: Jimmy9190]
mechtech2 Offline


Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
I don't believe the oil mfrs put more moly in because it has no effect or benefit.
I certainly like the improvements with Lubro Moly additive.

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#2462551 - 12/14/11 03:25 PM Re: PYB, Moly content and high miles [Re: Jimmy9190]
addyguy Offline


Registered: 09/08/05
Posts: 13426
Loc: Canada
I personally think higher moly content is good for ANY engine.

I think the science behind moly, and how it reduces wear in engines, is one of the best-established facts we have about an engine additive in oil.

I don't 'know' as much about boron as some others do - I'm still a bit confused about exactly what it does best - clean, or reduce wear?

That said, both QS and PYB have a significant amount of both moly and boron in them, so both will prevent wear in any engine better than many oils.

I went with QS for my last fill, even tho PYB was a similar price, b/c the QS 5W-20 has just slightly better cold-cranking values - yeah, I split hairs!
_________________________
2003 Mazda Tribute LX V-6, 169k miles.
Oil: Edge SPT, PP, and Lucas syn; MPH2 filter.

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#2462700 - 12/14/11 05:55 PM Re: PYB, Moly content and high miles [Re: addyguy]
abycat Offline


Registered: 12/06/10
Posts: 1108
Loc: grande prairie AB
I like some of the HM oils. Like mobil super 5000 It has a bunch of zinc and its a syn blend that is fairly affordable and does a pretty high mileage. I think any syn blend would be better than the conventional and keep your engine running good longer and better than the PYB or The other two you were using. And the mobil super has titanium the new moly. And I just noticed its a bit thinner on top and bottom so you could get .000000003% better fuel mileage.
_________________________
1994 f-150 4x4
2011 nissan versa hb

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#2462752 - 12/14/11 06:48 PM Re: PYB, Moly content and high miles [Re: abycat]
abycat Offline


Registered: 12/06/10
Posts: 1108
Loc: grande prairie AB
My bad i meant 2000
_________________________
1994 f-150 4x4
2011 nissan versa hb

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#2462861 - 12/14/11 08:47 PM Re: PYB, Moly content and high miles [Re: Solarent]
Y_K Offline


Registered: 05/29/09
Posts: 986
Loc: WA (USA)
Could you expand on dehydration a little more, please?
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Corruptissima republica plurimae leges
"The first step in community organization is community disorganization." - Alinsky

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