C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

Bad MPG while running on a tank with Fuel cleaner (Techron Concentrate Plus)

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Oct 11, 2011 | 10:02 PM
  #1  
LandSeaAir's Avatar
Thread Starter
Super Member
 
Joined: May 2010
Posts: 816
Likes: 21
2008 W204
Bad MPG while running on a tank with Fuel cleaner (Techron Concentrate Plus)

It could be the cold weather, but I am currently running on a tank of gas that is fully treated with Techron concentrate plus and it seems I am getting lousy gas mileage. Could the fuel cleaner possibly be the cause?
Reply
Old Oct 11, 2011 | 11:00 PM
  #2  
grane's Avatar
MBWorld Fanatic!
15 Year Member
 
Joined: Nov 2007
Posts: 1,339
Likes: 11
From: Gulf Coast but not Florida
GLK350, SL63 AMG
Originally Posted by LandSeaAir
It could be the cold weather, but I am currently running on a tank of gas that is fully treated with Techron concentrate plus and it seems I am getting lousy gas mileage. Could the fuel cleaner possibly be the cause?
What brand and octane of gas are you using, and apron where are you located? When was the last time you replaced your fuel filter?
Reply
Old Oct 12, 2011 | 03:12 AM
  #3  
Glyn M Ruck's Avatar
Super Moderator
MBWorld Ambassador

 
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
As long as you stuck to the dosage recommended. Techron will have zero effect on gas mileage. In fact might improve it if you had dirty injectors. Are you sure it's not a tank of winter gas?
Reply
Old Oct 12, 2011 | 03:22 AM
  #4  
LandSeaAir's Avatar
Thread Starter
Super Member
 
Joined: May 2010
Posts: 816
Likes: 21
2008 W204
It's 93 octance, from a generic, but new gas station. What's winter gas?

I was hoping it was related, but I guess not. I have 49,000 miles on the car so I haven't thought about replacing the fuel filter yet. What other maintenance do you recommend to maximize fuel efficiency? Would new air filters help? I have the car in the dealership now for one last warranty check. They are checking my report of the rpm dipping at idle, they said it could be adjusted. I am also have a NYS inspection done. I am hoping when I get it back it will be a little more efficient with the idle adjustment, I dont know.
Reply
Old Oct 12, 2011 | 07:34 AM
  #5  
Ben'sBenz's Avatar
Member
 
Joined: Dec 2010
Posts: 176
Likes: 0
From: Wichita, KS
2009 C300 Luxury P1 w/Multimedia, Arctic White
Glyn, is it ok to use those fuel treatment products on our cars? I always thought they weren't recommended.
Reply
Old Oct 12, 2011 | 09:03 AM
  #6  
Glyn M Ruck's Avatar
Super Moderator
MBWorld Ambassador

 
Joined: Jun 2008
Posts: 19,942
Likes: 192
From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Techron is the only product approved by Benz & Volvo. It is sold as a Benz P/N in some parts of the world.
Reply
Old Oct 12, 2011 | 10:36 AM
  #7  
LandSeaAir's Avatar
Thread Starter
Super Member
 
Joined: May 2010
Posts: 816
Likes: 21
2008 W204
Originally Posted by Glyn M Ruck
Techron is the only product approved by Benz & Volvo. It is sold as a Benz P/N in some parts of the world.
That's the only reason I used it. Otherwise I would have been overwhelmed over the choice of which fuel additive to use.
Reply
Old Oct 12, 2011 | 11:25 AM
  #8  
until the end's Avatar
Member
 
Joined: Nov 2010
Posts: 169
Likes: 0
From: Jordan
2009 c350 arctic White pano. MM HK
i have the same problem my c350 having 217 mls with the full tank 15 mls\gal i changed the spark plugs and the air filter i don't know where is the problem but i drive 100% in city stop and go so if you can help me and i use only 95 octane from total gas station
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

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

 Verdad Gallardo
story-1

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

 Verdad Gallardo
story-2

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

 Verdad Gallardo
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-5

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

 Verdad Gallardo
story-6

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

 Verdad Gallardo
story-7

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

 Verdad Gallardo
story-8

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

 Verdad Gallardo
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo
Old Oct 12, 2011 | 02:41 PM
  #9  
cyberglk350's Avatar
Member
 
Joined: Oct 2009
Posts: 173
Likes: 0
From: Colorado
2012 C350 Coupe Loaded
I've had this happen too. Not with the Benz but rather my Jeep. I used the techron stuff and I got crappy gas mileage.
Reply
Old Oct 12, 2011 | 02:54 PM
  #10  
Sportstick's Avatar
MBWorld Fanatic!
 
Joined: Jan 2009
Posts: 5,113
Likes: 57
From: Southwest USA
Another round of ICE
Originally Posted by LandSeaAir
It could be the cold weather, but I am currently running on a tank of gas that is fully treated with Techron concentrate plus and it seems I am getting lousy gas mileage. Could the fuel cleaner possibly be the cause?
Techron is fine and we use it on all our cars. But, I don't think now is the time to assess a problem. First, let's check the methodology, as you should not be on a "tank of gas", but only a partial tank. You drove to an almost empty tank, added about 10 gallons of fuel to have no more than 12 gallons in the tank in total, and then added Techron? You need to use up the Techron tank, refill to full, and then do the math on the next refill and distance traveled. Then, the actual fuel consumption can be measured.

Last edited by Sportstick; Oct 12, 2011 at 02:57 PM.
Reply
Old Oct 12, 2011 | 06:51 PM
  #11  
until the end's Avatar
Member
 
Joined: Nov 2010
Posts: 169
Likes: 0
From: Jordan
2009 c350 arctic White pano. MM HK
I did that calcilation befor 2 weeks and the same result im having 15 mpg and the full tank betwen 200-220 mile the delar changed the spark plugs and air filter still the same ????
Maybe ill take it to the delar agine and ill pay $$$ agine
Reply
Old Oct 12, 2011 | 10:25 PM
  #12  
victort's Avatar
Senior Member
 
Joined: Oct 2008
Posts: 396
Likes: 2
2010 C300
Originally Posted by until the end
I did that calcilation befor 2 weeks and the same result im having 15 mpg and the full tank betwen 200-220 mile the delar changed the spark plugs and air filter still the same ????
Maybe ill take it to the delar agine and ill pay $$$ agine
15 mpg sounds normal since you said earlier that you did 100% city driving.
Reply
Old Oct 12, 2011 | 10:55 PM
  #13  
keith100's Avatar
Senior Member
 
Joined: Feb 2008
Posts: 300
Likes: 2
From: Toronto
2008 c300
Originally Posted by victort
15 mpg sounds normal since you said earlier that you did 100% city driving.
Yes, sounds right to me too, for city stop and go.
Reply
Old Oct 13, 2011 | 06:06 AM
  #14  
until the end's Avatar
Member
 
Joined: Nov 2010
Posts: 169
Likes: 0
From: Jordan
2009 c350 arctic White pano. MM HK
Ahaa ok thank you
Reply

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 08:14 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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
story-9
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE