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#1655459 - 11/02/09 12:59 PM
Re: True Synthetic
[Re: d00df00d]
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Registered: 03/21/06
Posts: 6063
Loc: Las Vegas NV
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Additives have much more to do with wear protection than does base oil type.
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#1655633 - 11/02/09 03:34 PM
Re: True Synthetic
[Re: Tempest]
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Registered: 01/20/03
Posts: 12740
Loc: Redding Kali. For .Nia
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Most likley the cheapest properly rated oil would allow 99.675% of our vehicles we drive "with proper care" to the junkyard.
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I read an article and I don't have any clue if the info is valid but I read it so it must be good info.
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#1655634 - 11/02/09 03:35 PM
Re: True Synthetic
[Re: Tempest]
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Registered: 01/20/03
Posts: 12740
Loc: Redding Kali. For .Nia
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Additives have much more to do with wear protection than does base oil type. +1
_________________________
I read an article and I don't have any clue if the info is valid but I read it so it must be good info.
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#1656332 - 11/03/09 06:10 AM
Re: True Synthetic
[Re: Steve S]
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Registered: 05/17/09
Posts: 1265
Loc: N.H, U.S.A.
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Who wants majority iv? Other than cold flow, its not a good engine lubricant base by any means ...
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08 Yaris 5Sp
09 Forester 5Sp
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#1656730 - 11/03/09 01:14 PM
Re: True Synthetic
[Re: ARCOgraphite]
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Registered: 03/21/06
Posts: 6063
Loc: Las Vegas NV
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Who wants majority iv? Other than cold flow, its not a good engine lubricant base by any means ... Based on what?
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#1656744 - 11/03/09 01:28 PM
Re: True Synthetic
[Re: Tempest]
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Registered: 10/20/05
Posts: 2322
Loc: PA
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Film strength, no?
_________________________
BMW E36 ///M3
Motul: 300V 5w-40, Multi ATF, RBF 600
RLI: BioSyn 75w-110 LS
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#1656745 - 11/03/09 01:30 PM
Re: True Synthetic
[Re: d00df00d]
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Registered: 03/21/06
Posts: 6063
Loc: Las Vegas NV
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I'd like to see some documentation to support this. Also, how much "better" is GrpIII vs. Grp IV?
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#1656770 - 11/03/09 01:48 PM
Re: True Synthetic
[Re: Tempest]
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Registered: 10/20/05
Posts: 2322
Loc: PA
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You know what, I was slightly wrong. PAOs have much lower film strength than esters, but not necessarily than other kinds of oils. Here's one of my references. It's a Citgo presentation and is a better summary than I can provide: http://www.lubesandgreases.com/officefor...cations-WSO.pptI read something here once that said that group III oils can be formulated to have better seal compatibility, film strength, and solvency than PAO. Can't find that article, though...
_________________________
BMW E36 ///M3
Motul: 300V 5w-40, Multi ATF, RBF 600
RLI: BioSyn 75w-110 LS
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#1656773 - 11/03/09 01:48 PM
Re: True Synthetic
[Re: mpvue]
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Registered: 12/30/06
Posts: 2693
Loc: South Texas,USA
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I am not sure what Mobile is Mobile is a city in Alabama. Mobile 1 is mobil 1 once it`s moving around in your engine when you start it. It`s then "mobile" :^)
Edited by aquariuscsm (11/03/09 01:48 PM)
_________________________
1996 Nissan 300ZX 5-speed(#175 of 300)
Pennzoil 20W50 AC/Delco filter
Amsoil MTG(tranny)
Amsoil 80W90 GL5(rear diff)
Redline Water Wetter
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#1656867 - 11/03/09 02:55 PM
Re: True Synthetic
[Re: d00df00d]
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Registered: 03/21/06
Posts: 6063
Loc: Las Vegas NV
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The question becomes how much "film strength" is needed. I am unaware of any standardized test that determines film strength. If you know of one, please post it. Your link also (accuratly) states that PAO needs some ester content for seals and solubility. So we will never be dealing with a pure PAO oil anyway.
The fact is that PAO is used in gear lubes...the ultimate in "film strength" applications. If PAO films were a problem, they wouldn't be used there.
All of this base oil "film strength" talk is fascinating considering no one is talking about VII content that DOES affect wear rates under extreme conditions.
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#1656879 - 11/03/09 03:03 PM
Re: True Synthetic
[Re: Tempest]
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Registered: 12/30/06
Posts: 2693
Loc: South Texas,USA
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What I`d really love to know is,do group IV/V synthetics have any real advantage over dinos,besides engine cleanliness? The Timken test comes to mind,where Pennzoil and Valvoline dino showed much smaller wear scars than the most expensive synths. But,it`s been said that those tests have no pertinence to engine applications,so how important is film strength in engine oils?
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1996 Nissan 300ZX 5-speed(#175 of 300)
Pennzoil 20W50 AC/Delco filter
Amsoil MTG(tranny)
Amsoil 80W90 GL5(rear diff)
Redline Water Wetter
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#1657450 - 11/04/09 12:21 AM
Re: True Synthetic
[Re: aquariuscsm]
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Registered: 07/09/08
Posts: 24
Loc: WA, USA
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The only advantage I've seen marketed is group IV/V oils allow for longer oil change intervals and handle extreme temperatures.
I also believe the additive packages can play an important role in making up differences between base stocks (ZDDP, moly, TBN, etc).
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