Recent Topics
High Mileage Oil Advice ?
by ChrisD46
09/01/14 08:16 AM
Car that runs on saltwater
by hate2work
09/01/14 08:03 AM
AAP code, good for today only...
by mjk
09/01/14 07:48 AM
F1 - 2014 Italian Grand Prix
by gofast182
09/01/14 07:48 AM
1998 Olds 88-3800 engine
by ET16
09/01/14 06:20 AM
ATF Change (4T65E-HD) - What to do?
by tony1679
09/01/14 05:16 AM
Popular Science article in 1976 on synthetic oils
by Apollo14
09/01/14 03:05 AM
9/1-10/5 Pep Boys Sales Ad
by tenderloin
09/01/14 02:21 AM
To Buy the Jug, or use another weight?
by Timo325
09/01/14 02:00 AM
8/31-9/7 Pep Boys Sales Ad
by tenderloin
09/01/14 01:57 AM
weedeater one we261
by turbodieselfreak
09/01/14 01:42 AM
Engine rebuild durability?
by PandaBear
09/01/14 01:31 AM
Newest Members
DennisWaller, DMackey, Mambo_Dave, 2165, JohnSawyer
51160 Registered Users
Who's Online
80 registered (1foxracing, andyd, Axe Man, 05LGTLtd, Astro14, abycat, 8 invisible), 1472 Guests and 407 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51160 Members
64 Forums
218613 Topics
3447129 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG

Page 1 of 2 1 2 >
Topic Options
#3129245 - 09/19/13 06:20 AM Keep carbon buildup out of the engine?
horse123 Offline


Registered: 09/06/13
Posts: 40
Loc: Minneapolis, MN
2012 Audi A7 3.0T. Recently they sent out a notice about a warranty extension because of excessive carbon buildup on various parts of the engine. I'd much rather keep the carp out of it now, than pay someone $5000 to professionally decrap it later. What fuel additive could/should be used and how often?


Edited by horse123 (09/19/13 06:23 AM)

Top
#3129251 - 09/19/13 06:28 AM Re: Keep carbon buildup out of the engine? [Re: horse123]
rfeir Offline


Registered: 07/13/11
Posts: 160
Loc: NY
May be related to its application of direct fuel injection. The industry is always working on new fuel formulations to address this issue. Use a Name Brand fuel.
_________________________
RPF

Top
#3129261 - 09/19/13 06:39 AM Re: Keep carbon buildup out of the engine? [Re: horse123]
demarpaint Offline


Registered: 07/03/05
Posts: 20988
Loc: NY
Originally Posted By: horse123
What fuel additive could/should be used and how often?


Good luck finding one that can be poured into the tank and help a DI engine stay carbon free if that particular engine design is prone to that problem. For the best results it would have to be fed via a vacuum line. An Inverse Oiler would probably help. Clevy and I mentioned this a few times. You might want to look into an Inverse Oiler.
_________________________
GOD Bless our Troops!


Top
#3129281 - 09/19/13 07:06 AM Re: Keep carbon buildup out of the engine? [Re: horse123]
bourne Offline


Registered: 12/20/06
Posts: 1291
Loc: Greenwood, IN
Top Teir 91~93 octane gas, occasional Redline SI-1/Techron treatment and weekly Italian tunes for a good 20~30 miles should keep it to the minimum.
_________________________
2008 G35S : Maxlife Syn 5w30(3qts) + Synpower 5w40 MST(2qts)
2012 Mazda 3i GT: M1 EP 0w20 + CQ 84002

Top
#3129290 - 09/19/13 07:25 AM Re: Keep carbon buildup out of the engine? [Re: horse123]
badtlc Offline


Registered: 06/08/06
Posts: 3669
Loc: KC
Originally Posted By: horse123
2012 Audi A7 3.0T. Recently they sent out a notice about a warranty extension because of excessive carbon buildup on various parts of the engine. I'd much rather keep the carp out of it now, than pay someone $5000 to professionally decrap it later. What fuel additive could/should be used and how often?


Any PEA cleaner (Techron, Gumout, Redline, Amsoil, etc.) used regularly will help keep the combustion chamber and injectors clean. That is an important step #1.

Then, keeping the RPMs up above 4500 or so for 20+min at a time will help keep the intake valves clean. This does not have to be done at high speeds, regular highway speeds (70-80mph) are fine. This has been shown to be very effective. I think steady speeds at highway are better than full throttle/high RPM applications due to the different combustion modes the DI engines have and some of these modes block of the EGR.


Edited by badtlc (09/19/13 07:26 AM)
_________________________
2007 Ford Escape XLS 2.3L ATX Kendall 5w-20, MC Fl910s, 110k+
2012 Mazda 3i Skyactiv PP 5W-20, 6spd MTX Redline MTL, 35k+

Top
#3129300 - 09/19/13 07:36 AM Re: Keep carbon buildup out of the engine? [Re: horse123]
Miller88 Offline


Registered: 04/09/08
Posts: 6316
Loc: Onondaga County
It does not matter what you put in the tank, the fuel does not go past in the intake valve in a DI engine, but crud sucked through the PCV is.

Spraying slight bits of water or italian tuneups seem to be good ideas.

DI engines usually have higher compression right? I'd be concerned about using something like seafoam in a higher compression engine!
_________________________
'11 Focus PYB 45K
'00 Cherokee PYB 125K

Top
#3129310 - 09/19/13 07:46 AM Re: Keep carbon buildup out of the engine? [Re: horse123]
stockrex Offline


Registered: 01/08/06
Posts: 1267
Loc: Michigan
They have BG Chem tool but the best addy for keeping carbon out is NOT to drive it.
if you use any carbon dislodging addy, you will probably clog up stuff down the line.
remember, the hardest thing for an engine is to run when cold, so stop making short run throughout the day and make a long run,
_________________________
06Sienna:82k,07Ridgeline:16k,08Dmax:7k,10Fit:10k
Oil Whisperer!*Fear the DINO*

Top
#3129319 - 09/19/13 07:53 AM Re: Keep carbon buildup out of the engine? [Re: horse123]
SEMI_287 Offline


Registered: 02/25/11
Posts: 969
Loc: Up State NY
PCV catch can perhaps?
_________________________
2014 Dodge Avenger- Pennzoil Yellow Bottle 5w20
Napa Gold 7060
2008 Mitsubishi Galant -Brad Penn 5w30
Napa Gold


Top
#3129388 - 09/19/13 09:08 AM Re: Keep carbon buildup out of the engine? [Re: SEMI_287]
badtlc Offline


Registered: 06/08/06
Posts: 3669
Loc: KC
Originally Posted By: SEMI_287
PCV catch can perhaps?


Catch cans do not help. Plenty of proof of that showing they do not help.
_________________________
2007 Ford Escape XLS 2.3L ATX Kendall 5w-20, MC Fl910s, 110k+
2012 Mazda 3i Skyactiv PP 5W-20, 6spd MTX Redline MTL, 35k+

Top
#3129391 - 09/19/13 09:10 AM Re: Keep carbon buildup out of the engine? [Re: Miller88]
badtlc Offline


Registered: 06/08/06
Posts: 3669
Loc: KC
Originally Posted By: Miller88
It does not matter what you put in the tank, the fuel does not go past in the intake valve in a DI engine, but crud sucked through the PCV is.


that isn't completely true. gas cleaners indirectly do help. The crud coming through the PCV comes from highly volatile oil. The oil becomes increasingly volatile due to fuel dilution. Using fuel system cleaners to keep the combustion chamber clean and the injectors clean, helps to insure better combustion and a more complete burn. This helps reduce the fuel that makes it to the oil and helps preserve oil quality and reduce PCV vapors.
_________________________
2007 Ford Escape XLS 2.3L ATX Kendall 5w-20, MC Fl910s, 110k+
2012 Mazda 3i Skyactiv PP 5W-20, 6spd MTX Redline MTL, 35k+

Top
#3130330 - 09/20/13 06:34 AM Re: Keep carbon buildup out of the engine? [Re: horse123]
horse123 Offline


Registered: 09/06/13
Posts: 40
Loc: Minneapolis, MN
So top tier gas is the best way?

Top
#3130380 - 09/20/13 07:34 AM Re: Keep carbon buildup out of the engine? [Re: horse123]
badtlc Offline


Registered: 06/08/06
Posts: 3669
Loc: KC
Originally Posted By: horse123
So top tier gas is the best way?


Quality fuel with high detergent levels is probably a good idea. Cheap fuels and regular use of cleaners can probably do as well.
_________________________
2007 Ford Escape XLS 2.3L ATX Kendall 5w-20, MC Fl910s, 110k+
2012 Mazda 3i Skyactiv PP 5W-20, 6spd MTX Redline MTL, 35k+

Top
#3130690 - 09/20/13 01:14 PM Re: Keep carbon buildup out of the engine? [Re: horse123]
horse123 Offline


Registered: 09/06/13
Posts: 40
Loc: Minneapolis, MN
^ obvious spam account is obvious

Top
#3130698 - 09/20/13 01:20 PM Re: Keep carbon buildup out of the engine? [Re: horse123]
kimandsally Offline


Registered: 09/07/13
Posts: 16
Loc: United Kingdom
Originally Posted By: horse123
^ obvious spam account is obvious


Hi I have contacted the administrator of this site explaining what had happened, I DO NOT have to explain to you, either believe or not DO NOT accuse me of something I have never been EVER on ANY forum and I have been around the internet for 20 years using the same name, google me and then come back and apolagise.

PS
I love it you ask for help then accuse people who have spent their time trying to help of lying. Your best bet is to ignore what everyone says ans go wreck you car in you own way that way you will have no one else to blame.
One thing for sure I wouldn't type another letter to help you even if you were on fire!


Edited by kimandsally (09/20/13 01:31 PM)

Top
#3130720 - 09/20/13 01:51 PM Re: Keep carbon buildup out of the engine? [Re: horse123]
Trajan Offline


Registered: 07/16/05
Posts: 3314
Loc: SE PA
I think it's the non sponsor link that triggered the response.
_________________________

Lack of harm does not mean proof of benefit.

Top
Page 1 of 2 1 2 >