Diesel Forum Forum for Diesel engine vehicle related discussion
Sponsored by:
Sponsored by:

De-coking injectors

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Nov 11, 2022 | 02:35 PM
  #1  
321@Wagon$81~94's Avatar
Thread Starter
Newbie
 
Joined: May 2022
Posts: 5
Likes: 0
1981 300TD
De-coking injectors

Is it recommended to use sae 30 non detergent oil to de-coke injectors
Reply
Old Nov 12, 2022 | 11:20 AM
  #2  
rapidoxidation's Avatar
MBWorld Fanatic!
 
Joined: Jan 2016
Posts: 2,749
Likes: 882
From: In the Shadow of the Tetons
2013 ML350 Bluetec
If you're building up black coke on your injectors it isn't the oil's fault. Are you talking about Black Death or is there some other issue?
Reply
Old Nov 17, 2022 | 06:53 AM
  #3  
ot1's Avatar
ot1
Super Member
 
Joined: Apr 2007
Posts: 633
Likes: 48
From: USA
2006 E320 CDI
Originally Posted by 321@Wagon$81~94
Is it recommended to use sae 30 non detergent oil to de-coke injectors
where is the coke on the nozzle or on the injector body?
Reply
Old Nov 18, 2022 | 06:28 PM
  #4  
321@Wagon$81~94's Avatar
Thread Starter
Newbie
 
Joined: May 2022
Posts: 5
Likes: 0
1981 300TD
De-coking

Someone told me that occasionally adding a quart of SAE 30 non-detergent motor oil to the fuel tank would help in burning off any coking that might have collected on the injectors. I'm wondering what damage this might cause.

Bob
Reply
Old Nov 19, 2022 | 10:46 AM
  #5  
kajtek1's Avatar
MBWorld Fanatic!
15 Year Member
Photogenic
Liked
Loved
 
Joined: Jan 2009
Posts: 9,225
Likes: 1,798
From: V E G A S
1922 Ford Model T / no OBD
Is this for 1981 model?
I remember buying new injector tips for those for like $4-fifty. Obviously that was like 20 years ago, so adjust the price for inflation.
Beware that new, electronic injectors are totally different animals. They require coding and when wrongly coded, the misaligned fuel injections can burn hole in pistons.
As for old remedies, when I never tired it, the wisdom says that adding high-detergent ATF into fuel, not only cleans the system, but helps prevent diesel gelling in winter.

Last edited by kajtek1; Nov 19, 2022 at 10:48 AM.
Reply
Old Nov 19, 2022 | 01:18 PM
  #6  
321@Wagon$81~94's Avatar
Thread Starter
Newbie
 
Joined: May 2022
Posts: 5
Likes: 0
1981 300TD
This is a 1981 300TD. Someone told me that a quart of sae30 non detergent motor oil, occasionally in the fuel tank, would help burn off any deposits on the injectors. Would there be any problem doing this?
Reply
Old Nov 19, 2022 | 01:37 PM
  #7  
John CC's Avatar
MBWorld Fanatic!
Photogenic
Liked
Loved
Community Favorite
 
Joined: Jun 2021
Posts: 1,928
Likes: 524
From: New Hampsha
'17 GLS450, '14 GLK250, Grandpa's Roadster
I don't see how there could be a problem, but I doubt anything good will come of it, either. Try something like FPPF Total Power or Power Service Diesel Kleen instead.
Reply
Old Nov 19, 2022 | 09:52 PM
  #8  
Quint22's Avatar
Super Member
Veteran: Navy
 
Joined: Jun 2022
Posts: 739
Likes: 328
From: WA State, USA
2014 Cummins, 2014 E250 Bluetec
Originally Posted by 321@Wagon$81~94
This is a 1981 300TD. Someone told me that a quart of sae30 non detergent motor oil, occasionally in the fuel tank, would help burn off any deposits on the injectors. Would there be any problem doing this?
Actually its suppose to be conventional 2 stroke oil that helps with everything diesel. Been proven to boost cetane as much as any additive. Its gota be conventional and not the synthetic stuff. As far as the injectors I doubt any thing will make a difference. Not sure ive heard of injectors coking up either. Now turbos running conventional oil theoretically maybe
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

 Verdad Gallardo
story-1

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

 Verdad Gallardo
story-2

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

 Verdad Gallardo
story-3

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-4

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-5

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-6

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-7

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-8

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-9

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 01:35 PM.

story-0
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

Slideshow: Mercedes-AMG's new electric GT 4-Door Coupe trades combustion for software, synthetic noise, and more than 1,100 horsepower.

By Verdad Gallardo | 2026-05-20 20:08:15


VIEW MORE
story-1
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-2
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-3
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-4
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-5
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-6
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-7
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-8
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-9
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE