Recent Topics
Condensation in headlights?
by irv. 09/23/18 05:06 PM
Nissan VQ V-6 Engines
by Al. 09/23/18 04:57 PM
List of dexos licensed oils?
by k1xv. 09/23/18 04:24 PM
High flow oil pump? Thinner oil?
by SnowDrifter. 09/23/18 04:06 PM
Is Tiger back?
by gman2304. 09/23/18 03:51 PM
Castrol Edge Pro OE LLIV FE 0W20 for VW508
by BrandonT. 09/23/18 03:33 PM
Value of 90's stereo equipment
by wrcsixeight. 09/23/18 03:28 PM
Wisdom of BITOG'ers wanted- 19 Avalon Hybrid oil
by scion_xb. 09/23/18 02:36 PM
w116 300sd Mercedes Diesel HPR fuel
by Gito. 09/23/18 02:14 PM
Power Stop Wheel Bearing/Hubs?
by oilpsi2high. 09/23/18 01:37 PM
Dump the 30k ATF in the 17 Kia?
by 3Aone. 09/23/18 01:31 PM
Miata Aisin 6 speed question
by 10ecfarmer. 09/23/18 12:36 PM
Shortest time you owned a car?
by Corollaman. 09/23/18 12:21 PM
Winter tires pinned for studs, but without studs
by Corollaman. 09/23/18 12:12 PM
03 Accord V6 "needs" iridium plugs?
by columnshift. 09/23/18 11:40 AM
03 Accord V6 'brake' light on after brake work...
by columnshift. 09/23/18 11:29 AM
Why does Redline Motor oil quiet lifter noise
by Onetor. 09/23/18 11:11 AM
2017 Hyundai Tucson burning oil (Help!)
by carviewsonic. 09/23/18 11:09 AM
Newest Members
The_Money_Light, DALTRON0659, skippermatt, HondaTech250, SandCruzer
66047 Registered Users
Who's Online Now
83 registered members (77GrandPrix, BigCahuna, aikwae, 3Aone, Al, 55hambone, 8 invisible), 1,733 guests, and 37 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics290,900
Posts4,852,127
Members66,047
Most Online3,590
Jan 24th, 2017
Donate to BITOG
Previous Thread
Next Thread
Print Thread
Hop To
Is Zinc a "carbon promoter"? #4536052
10/07/17 09:31 AM
10/07/17 09:31 AM
Joined: Apr 2017
Posts: 402
Mississippi
Speak2Mountain Offline OP
Speak2Mountain  Offline OP
Joined: Apr 2017
Posts: 402
Mississippi
Read this: "Further to what has been said, the type of engine oil used and the fuel you choose to run the car on make a massive contribution to carbon build up."

"Older 'classic'oils, (especially the monogrades, but anything with an SAE rating of SF-CG or earlier) often have a high zinc content, and zinc is an unbelievably good carbon promoter. Just 6 parts per million in diesel fuel can quickly lead to coked up fuel injectors!"

Re: Is Zinc a "carbon promoter"? [Re: Speak2Mountain] #4536062
10/07/17 09:38 AM
10/07/17 09:38 AM
Joined: Jun 2002
Posts: 12,521
The Motor City
Kestas Offline
Kestas  Offline
Joined: Jun 2002
Posts: 12,521
The Motor City
What does zinc in oil have to do with zinc in fuel?

Re: Is Zinc a "carbon promoter"? [Re: Kestas] #4536067
10/07/17 09:44 AM
10/07/17 09:44 AM
Joined: Sep 2004
Posts: 7,529
Marshfield , MA
andyd Offline
andyd  Offline
Joined: Sep 2004
Posts: 7,529
Marshfield , MA
Originally Posted By: Kestas
What does zinc in oil have to do with zinc in fuel?
coked rings? Just a wild guess.


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Is Zinc a "carbon promoter"? [Re: Speak2Mountain] #4536074
10/07/17 09:50 AM
10/07/17 09:50 AM
Joined: Dec 2003
Posts: 9,801
Florida, Cape Coral
Eddie Offline
Eddie  Offline
Joined: Dec 2003
Posts: 9,801
Florida, Cape Coral
Do we have a link to an article that has some data? Might be interesting. Ed


CX5 Touring 2.5L :-)
Re: Is Zinc a "carbon promoter"? [Re: Eddie] #4536092
10/07/17 10:11 AM
10/07/17 10:11 AM
Joined: Jun 2010
Posts: 739
Australia
uart Offline
uart  Offline
Joined: Jun 2010
Posts: 739
Australia
Originally Posted By: Eddie
Do we have a link to an article that has some data? Might be interesting. Ed

Good question. The only reference that I can find to the OPs quote is a guy called George saying it in a Norton motorcycle forum.

http://www.nortonownersclub.org/noc-chat/general/389181786

Last edited by uart; 10/07/17 10:11 AM.
Re: Is Zinc a "carbon promoter"? [Re: Speak2Mountain] #4536106
10/07/17 10:45 AM
10/07/17 10:45 AM
Joined: Jul 2016
Posts: 1,090
Europe
SonofJoe Offline
SonofJoe  Offline
Joined: Jul 2016
Posts: 1,090
Europe
I've never heard of ZDDP being a carbon promoter. I wonder if this is a case of 'guilt by association'?

If your engine's consuming oil (down the valve guides say) then it will deffo be a major contributor to piston deposits. If you analysed said deposits, you would definitely find Zinc there (as well as Phosphorus). If you were running very old spec oils, then you might find a lot more Zinc than say Calcium or Magnesium (from the Detergent). Also if we're talking old oils (all Group I, bugger all by way of additive) then the oil won't need much 'promoting' to turn to oxidised junk.

The link was for old Norton bikes (the ultimate in automotive hi-tech in 1961!) so all of the above seems plausible to me.

Re: Is Zinc a "carbon promoter"? [Re: Speak2Mountain] #4536140
10/07/17 11:26 AM
10/07/17 11:26 AM
Joined: Oct 2014
Posts: 11,854
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,854
Idaho
Everything that probably doesn't combust thoroughly leaves carbon deposits cause most everything is carbon based . Chem 101

Re: Is Zinc a "carbon promoter"? [Re: SonofJoe] #4536282
10/07/17 03:19 PM
10/07/17 03:19 PM
Joined: Oct 2014
Posts: 11,854
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,854
Idaho
Originally Posted By: SonofJoe
I've never heard of ZDDP being a carbon promoter. I wonder if this is a case of 'guilt by association'?

If your engine's consuming oil (down the valve guides say) then it will deffo be a major contributor to piston deposits. If you analysed said deposits, you would definitely find Zinc there (as well as Phosphorus). If you were running very old spec oils, then you might find a lot more Zinc than say Calcium or Magnesium (from the Detergent). Also if we're talking old oils (all Group I, bugger all by way of additive) then the oil won't need much 'promoting' to turn to oxidised junk.

The link was for old Norton bikes (the ultimate in automotive hi-tech in 1961!) so all of the above seems plausible to me.
If we are going back that far how about the leaded gas.


2015 Ford F150 2.7
2018 Ford F350 6.2

BOB IS THE OIL GUY® Powered by UBB.threads™