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Fuel additive for the 7.3,,, necessary or not?

35K views 41 replies 20 participants last post by  DieselDan94  
#1 ·
While anti gel is a no brainer in cold weather, I was wondering what you guys run as a fuel additive to make up for the lack of lubrication with the ULSD. I have heard of running ATF, Two stroke outboard motor oil, Marvels Mystery Oil, or just nothing at all...
What say you?
 
#3 ·
Do a little Google fu and you will find a thread with scientific research attached. Most of the stuff is snake oil. The research proves each ones effectiveness. I'd post a link but it would be rude as its from a different forum. I did last week and bought the stuff at the top of the list. $4/30gal is worth it for a little piece of mind. They even sell a 6 pack in a sealed ammo box that you can throw behind your rear seats. The stuff stinks bad so I recommend the sealed box.
 
#5 ·
Anti gel is a thing of the past too unless it's seriously cold wherever you are. I don't mean "freezing" cold, I mean like 25* colder than that.

The antigel added in modern winter blend fuel is sufficient for most climates
 
#6 ·
My Ford Diesel Tech said to put a quart of ATF in it with each fill up. :dunno: I've heard that it causes a lot of ash deposits on the injectors.

When I had a Cummins I would put the TCW-3 (1oz per gallon) in it every fill up and it ran much quieter. (don't ask me why) I know that the PSD is a different animal altogether, however, does TCW-3 make the PSD run quieter like it did my Cummins?
Also, a read a study years ago, that said that TCW-3 raised the cetane levels and made the engine run better and get better fuel economy. Studies these days are like rectums...Everyone has one. :confused:
 
#7 ·
My Ford Diesel Tech said to put a quart of ATF in it with each fill up. :dunno: I've heard that it causes a lot of ash deposits on the injectors.



When I had a Cummins I would put the TCW-3 (1oz per gallon) in it every fill up and it ran much quieter. (don't ask me why) I know that the PSD is a different animal altogether, however, does TCW-3 make the PSD run quieter like it did my Cummins?

Also, a read a study years ago, that said that TCW-3 raised the cetane levels and made the engine run better and get better fuel economy. Studies these days are like rectums...Everyone has one. :confused:

I would stay far away from ATF. it's got too many detergents and actually reduces the lubricity of the fuel.

The reason I try to run tcw-3 is to improve the lubricity of the fuel. It should make the injectors last longer since they are mostly made of metal. I think it's noticeably quieter with the added oil.


Sent from my dumb iPhone
 
#13 ·
My truck runs smoothest and quietest with a quart of 2-cycle mixing oil in the gas tank. My injectors only have about 7,000 miles on them, want to keep them for another 200,000 miles, 2 cycle oil is a small price to pay for that.
 
#14 ·
Walmart sells tcw3 2 stroke mix for 12$ a gallon. I use a quart every tank. Yes it does quiet down the injectors. For 3$ extra a fill up It gives me added peace of mind. If you get bored add some of the maxima 2 stroke oil and your truck will smell like the race track!:woot:
 
#15 ·
If memory serves me, these engines were designed to run on low sulfur diesel, not Ultra LSD. The TCW-3 replaces the lubrication that the sulfur previously provided.

As stated above, these trucks run just fine on ULSD, and probably need nothing to operate adequately regarding the use of additives. That said, I will probably never fill up without dumping something in the tank to make ME feel better. Right now TCW-3 appears to be the overall favorite. I will be adding it on the next fill up. I'm interested to see if it has the same quieting effect that it does with the Cummins.
 
#17 ·
I've been running 1 Qt. of TCW-3 every tank for about 6 months now. I don't keep track of fuel mileage because 1-2 mpg for running around town for me isn't a big deal but I do notice the truck does run a little rougher and louder if I skip a fill up. So far I like it. Smoother and quieter is good for me, plus the added lubricity for the injectors is a nice piece of mind. Just my :twocents:
 
#18 ·
Since I don't see it linked in this thread yet, I'll add it ;)

http://rivrdog.typepad.com/files/copy-of-diesel-fuel-additive-version-3.pdf

This has actually been discussed here Many times, my personal view on it is this;

2-stroke, ATF, whatever...., is just silly. I mean, why would you use something that's not only Not Meant for this application but lacks all the other advantages a proper additive would give you?

Is it just cost? You fill the tank for between $100/$150 (depending on the wild swing of fuel prices in the past few tears) but are then concerned with the cost of 2 additives $3.00 difference in a fill-up? Really???

Is it just Laziness? Not worth the effort to order it and have it sit on the shelf next to your Oil/Filters you have for maintenance? Just So Much easier to buy every few weeks at WalMart? And, for that, you miss the Cetane Improvement, Anti-Gel and Demulsifing treatments ~ Makes No Sense to me....

The answer to the question "is it necessary" is pretty clear after you read the 2007 study I think :D
 
#19 ·
Since I don't see it linked in this thread yet, I'll add it ;)

http://rivrdog.typepad.com/files/copy-of-diesel-fuel-additive-version-3.pdf

This has actually been discussed here Many times, my personal view on it is this;

2-stroke, ATF, whatever...., is just silly. I mean, why would you use something that's not only Not Meant for this application but lacks all the other advantages a proper additive would give you?

this is exactly what 2 stroke was designed for

Is it just cost? You fill the tank for between $100/$150 (depending on the wild swing of fuel prices in the past few tears) but are then concerned with the cost of 2 additives $3.00 difference in a fill-up? Really???

how often are you crying at the pump :rofl:

Is it just Laziness? Not worth the effort to order it and have it sit on the shelf next to your Oil/Filters you have for maintenance? Just So Much easier to buy every few weeks at WalMart? And, for that, you miss the Cetane Improvement, Anti-Gel and Demulsifing treatments ~ Makes No Sense to me....

The answer to the question "is it necessary" is pretty clear after you read the 2007 study I think :D
:confused: :confused:
 
#27 ·
your link was done in 2007 BEFORE ULSD which came out in 2008. your argument is invalid and to throw on top of that, most of those people have changed their compounds over the years.

yes, 2 stroke was designed to mix with FUEL to lubricate stuff along the way and be burnt off in the combustion. gas and diesel started out as 2 stroke designs.
 
#30 ·
your link was done in 2007 BEFORE ULSD which came out in 2008. your argument is invalid and to throw on top of that, most of those people have changed their compounds over the years.
So,,,, what's changed since '07 ???

The 7.3's requirements? USLD? 2-Stroke Oil? Bio Diesel? XPD? :p

You have some personal knowledge of the other good choices formulations being changed in;

FPPF RV, Bus, SUV Diesel/Gas fuel treatment
Schaeffer Diesel Treat 2000
Stanadyne Lubricity Formula
Amsoil Diesel Concentrate
Power Service Diesel Kleen + Cetane Boost

Which Ones????

I'm quite sure that today there are better ones, too bad somebody hasn't invested the effort/expense to do another comparison. But until then, it's all we have to work with...

I happened to choose XPD, I just bought another 5gal pail for $230 that I expect will last me 3 or more Years. I'm not implying it's the Only choice, even convenient ones that don't require you to do what I do by getting a 3yr supply all at once (WalMart carries Diesel Clean).

As I said before, there have been a Ton of threads on this. I have posted my feelings on it in most of them, I expect this reaction from the 2-Stroke zealots (it always comes-down to be more about Emotion than Logic) :wink[3]:
 
#28 ·
Like I've said before, I'm not going too get into a debate about the chemical breakdown and all that BS, I'm just going by what has worked for me, I had a 2000 7.3 with almost 260K and ran GREAT using 2 stroke oil and other additive's like diesel kleen. Now I have a 01 that when I bought it ran rough and I could tell that the injectors had never had an additive because the guy I bought if from never added any, so after several thousands of miles of running 2 stroke oil, and diesel kleen, and now I'm using Howe's, my truck is running really well. Still doesn't run as nice as my old truck but darn close too it, call it a waste of time, I don't, I call it trying too take the best care possible so I won't need a newer POS 6.7L.
 
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#29 ·
All the hate on the two geeze, I probably add too much, I chuc a small bottle of it in there and the bottle of DK.
 
#31 ·
Pre 2007 was low sulfur diesel.
Post 2007 was ultra low sulfur diesel.

Like you said its all been posted in the other threads, you might be ignoring the facts because of your emotion.

Bottom line is, does two stroke do any harm? No. Does is quite the injectors and smooth out idle? Yes. It's 12 bucks for a gallon, I run a quart every tank. So 4 bucks a fill up.
 
#32 ·
here is some of the testing done by independent company.
 

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#36 ·
I have put 2.000 miles on my truck running no additives so that I would get used to it and be able to tell the difference when I did finally add something to the fuel. Yesterday while my wife was in Walmart doing the shopping, I filled up and added 1 qt. of TCW-3. After about 15 minutes of driving around she looks over at me and says, "What's up with this thing, it's not as noisy as it usually is".
2-stoke oil really did make a difference. One would think that something "clacking" metal to metal that loud (unnecessarily) can't be good for it.
 
#37 ·
I just got some Opti-lube winter blend. I have only used it for 1 tank but it seems to idle quieter. I think its worth it with what that test was saying for lubrication.
 
#38 ·
So is it safe to say that those of you using both the DK and TCW3 are getting the added benefits of both or is my logic off? At the time of the test, the opti lube XPD was $4.35 per tank and gives 319 improvement. If you add both DK and TCW3, that comes up to $2.67 per tank and 223 improvement (up to position #3 on test). For about half the price per tank it seems to me like the only downside is the hassle of two additives.
 
#39 ·
Where are you getting these numbers (319 and 223) from? ON EDIT: Sorry, I didn't read enough did I? :doh:
 
#40 ·
Might be an overkill, but I run Optilube XPD , DK and TCW-3.
I keep 3/4 quart of TCW3 in the gallon jug and mix in the other two and slosh it around before putting in the tank.
My truck runs like a raped ape.