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So What is Oil 'Scuffing'? #4535215
10/06/17 08:15 AM
10/06/17 08:15 AM
Joined: Apr 2017
Posts: 398
Mississippi
Speak2Mountain Offline OP
Speak2Mountain  Offline OP
Joined: Apr 2017
Posts: 398
Mississippi

http://www.underhoodservice.com/gdi-syst...-intake-valves/

Since oil formulation is a work in progress, Iíll summarize by saying that oils used in GDI, particularly in turbocharged GDI (TGDI) engines, must meet much higher standards than the generic oils intended for conventional, naturally aspirated fuel-injected engines.

Oils intended for use in a GDI engine must have enough scuff resistance to protect the camshaft that drives a high-pressure mechanical fuel pump capable of developing well over 2,500 psi of fuel pressure. [u][/u][i][/i][color:#FF0000][/color]

Re: So What is Oil 'Scuffing'? [Re: Speak2Mountain] #4535217
10/06/17 08:16 AM
10/06/17 08:16 AM
Joined: Apr 2017
Posts: 398
Mississippi
Speak2Mountain Offline OP
Speak2Mountain  Offline OP
Joined: Apr 2017
Posts: 398
Mississippi
and thx ahead of time

Re: So What is Oil 'Scuffing'? [Re: Speak2Mountain] #4535221
10/06/17 08:21 AM
10/06/17 08:21 AM
Joined: Oct 2005
Posts: 11,363
PA
d00df00d Online content
d00df00d  Online Content
Joined: Oct 2005
Posts: 11,363
PA
I don't think scuff resistance means "oil scuffing" is a thing. I think it means the oil prevents scuffing in engine parts.


2011 Mazda RX-8 R3
Mobil Super 5w-20
Re: So What is Oil 'Scuffing'? [Re: Speak2Mountain] #4535228
10/06/17 08:38 AM
10/06/17 08:38 AM
Joined: Oct 2010
Posts: 1,779
.
Danh Offline
Danh  Offline
Joined: Oct 2010
Posts: 1,779
.
While the camshaft-driven high pressure fuel pump is an added complication, higher quality oils don't always go with DI/TGDI engines. Ford, for example, allows the use of conventional engine oils in its DI/TGDI engines.

Even GM's new Dexos1 Gen 2 spec seems aimed more at preventing LSPI than accommodating whatever extra stress a high pressure fuel pump places on an engine oil.

Re: So What is Oil 'Scuffing'? [Re: Speak2Mountain] #4535290
10/06/17 10:36 AM
10/06/17 10:36 AM
Joined: May 2006
Posts: 4,010
Central Wisconsin
dwendt44 Offline
dwendt44  Offline
Joined: May 2006
Posts: 4,010
Central Wisconsin
IS the oiling system even part of the
high pressure fuel pump?


There's no such thing as:
Too big of a battery,
Too large of a gas tank,
or too loud of a horn,
or too bright headlights.
Re: So What is Oil 'Scuffing'? [Re: dwendt44] #4535302
10/06/17 10:56 AM
10/06/17 10:56 AM
Joined: Apr 2017
Posts: 398
Mississippi
Speak2Mountain Offline OP
Speak2Mountain  Offline OP
Joined: Apr 2017
Posts: 398
Mississippi
I know right?

Re: So What is Oil 'Scuffing'? [Re: Speak2Mountain] #4535314
10/06/17 11:21 AM
10/06/17 11:21 AM
Joined: May 2009
Posts: 12,181
N.H, U.S.A.
ARCOgraphite Offline
ARCOgraphite  Offline
Joined: May 2009
Posts: 12,181
N.H, U.S.A.


2014 Nissan Rogue S CVT, OC#9 41392mi-QSUD10W30 + M110A CHAMP Filter; 2017 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter
Re: So What is Oil 'Scuffing'? [Re: ARCOgraphite] #4535576
10/06/17 04:36 PM
10/06/17 04:36 PM
Joined: Oct 2005
Posts: 11,363
PA
d00df00d Online content
d00df00d  Online Content
Joined: Oct 2005
Posts: 11,363
PA
^^ Wow!


2011 Mazda RX-8 R3
Mobil Super 5w-20
Re: So What is Oil 'Scuffing'? [Re: Speak2Mountain] #4535602
10/06/17 05:15 PM
10/06/17 05:15 PM
Joined: Jul 2010
Posts: 18,651
PNW
ZeeOSix Offline
ZeeOSix  Offline
Joined: Jul 2010
Posts: 18,651
PNW
Quote:
Oils intended for use in a GDI engine must have enough scuff resistance to protect the camshaft that drives a high-pressure mechanical fuel pump capable of developing well over 2,500 psi of fuel pressure.

I'd think they would use some kind of roller setup on the high pressure fuel pump if the stress is high on the actuating lobe.

Re: So What is Oil 'Scuffing'? [Re: Speak2Mountain] #4535633
10/06/17 06:01 PM
10/06/17 06:01 PM
Joined: Aug 2003
Posts: 12,892
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 12,892
NE,Ohio
there is no "oil scuffing"

oil needs to prevent scuffing wear


2019 Jeep Cherokee Trailhawk 2.0T
Re: So What is Oil 'Scuffing'? [Re: Speak2Mountain] #4537764
10/09/17 08:40 AM
10/09/17 08:40 AM
Joined: May 2009
Posts: 12,181
N.H, U.S.A.
ARCOgraphite Offline
ARCOgraphite  Offline
Joined: May 2009
Posts: 12,181
N.H, U.S.A.
Agree. Just poor engine design or poor materials.


2014 Nissan Rogue S CVT, OC#9 41392mi-QSUD10W30 + M110A CHAMP Filter; 2017 Subaru Crosstrek CVT OC#2 ?? mi-SOA/Idemitsu 0w20 + SOA Filter
Re: So What is Oil 'Scuffing'? [Re: Speak2Mountain] #4537787
10/09/17 09:29 AM
10/09/17 09:29 AM
Joined: Oct 2015
Posts: 2,651
Balearic Islands , Spain
FordCapriDriver Online content
FordCapriDriver  Online Content
Joined: Oct 2015
Posts: 2,651
Balearic Islands , Spain
A liquid cannot suffer from scuffing.
Simple as that.


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.
Re: So What is Oil 'Scuffing'? [Re: FordCapriDriver] #4537802
10/09/17 09:55 AM
10/09/17 09:55 AM
Joined: Sep 2010
Posts: 6,987
Texas
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 6,987
Texas
Oil scuffing is when you bash someone elseís choice in oil to make yourself feel superior

Re: So What is Oil 'Scuffing'? [Re: Speak2Mountain] #4537816
10/09/17 10:08 AM
10/09/17 10:08 AM
Joined: Jul 2017
Posts: 1,292
Douglas County, Colorado
bigj_16 Offline
bigj_16  Offline
Joined: Jul 2017
Posts: 1,292
Douglas County, Colorado
The upside to oil scuffing, is that when it happens, because it is liquid, it will buff right out. smile

Re: So What is Oil 'Scuffing'? [Re: bigj_16] #4537865
10/09/17 10:51 AM
10/09/17 10:51 AM
Joined: Sep 2010
Posts: 6,987
Texas
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 6,987
Texas
True. ÖOr it goes out to the drain pan Ö laugh


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