2 cycle oil as fuel addative in diesel vehicles

Hey folks,
Wife has a 2006 Kia Sorento w/ a 2.5 diesel motor. She read on a forum that because modern diesel is missing something, you should use 2 stroke oil (about a pint to a tank at fillup)to improve performance and quiet thing down. Anything to that?

Thanks, Dave

Not IF you are useing good diesel fuel, when a diesel gets really quite, time for overhaul!

I have never heard that, but I have often burned old mixed gas in my vehicles after it has started to go sour. Never hurt anything. Might even add a little to top end lubrication.

Any kind of engine oil added to today's Ultra Low Sulfur diesel fuel will add lubricity which will extend the life of injectors and injection pumps. I can't say about whether or not it will quiet anything down...it's a diesel, so the combustion noise is louder than a low compression gas engine. I know the manufacturers claim their [new] engines are designed for the ULS Diesel fuel, but all they care is that your injection components make it through the warranty period. For my engines, I'm going for 250,000+ miles. You can buy fuel additives that will add lubricity and also improve cetane rating--I like Stanadyne Performance Formula or the "junior" product, but they have several to choose from--depending on your application. Power Service "Diesel Kleen" is another one I use in two of our vehicles.

To sum up--I wouldn't concern yourself with noise the engine makes, but how to make it last longer without expensive repairs...

Yes, two-stroke-cycle oil has been tested against other diesel addtives and works very well.

But for a Sorrento diesel? The extra lube is an issue for mechanical injectors and rotary injection pumps. I know the newer Sorrentos are common rail and the lack of lube should not be a big issue.

These results are listed in the order of performance in the HFRR test. The baseline fuel
used in every test started at an HFRR score of 636. The score shown is the tested HFRR
score of the baseline fuel/additive blend.
Also included is the wear scar improvement provided by the additive as well as other
claimed benefits of the additive. Each additive is also categorized as a Multi-purpose
additive, Multi-purpose + anti-gel, Lubricity only, non-conventional, or as an additive
capable of treating both gasoline and diesel fuel.
As a convenience to the reader there is also information on price per treated tank of diesel
fuel (using a 26 gallon tank), and dosage per 26 gallon tank provided as “ounces of
additive per 26 gallon tank”.

In Order Of Performance:

1) 2% REG SoyPower biodiesel
HFRR 221, 415 micron improvement.
50:1 ratio of baseline fuel to 100% biodiesel
66.56 oz. of 100% biodiesel per 26 gallons of diesel fuel
Price: market value

2)Opti-Lube XPD
Multi-purpose + anti-gel
cetane improver, demulsifier
HFRR 317, 319 micron improvement.
256:1 ratio
13 oz/tank
$4.35/tank

3)FPPF RV, Bus, SUV Diesel/Gas fuel treatment
Gas and Diesel
cetane improver, emulsifier
HFRR 439, 197 micron improvement
640:1 ratio
5.2 oz/tank
$2.60/tank

4)Opti-Lube Summer Blend
Multi-purpose
demulsifier
HFRR 447, 189 micron improvement
3000:1 ratio
1.11 oz/tank
$0.68/tank

5)Opti-Lube Winter Blend
Muti-purpose + anti-gel
cetane improver
HFRR 461, 175 micron improvement
512:1 ratio
6.5 oz/tank
$3.65/tank

6)Schaeffer Diesel Treat 2000
Multi-purpose + anti-gel
cetane improver, emulsifier, bio-diesel compatible
HFRR 470, 166 micron improvement
1000:1 ratio
3.32 oz/tank
$1.87/tank

7)Super Tech Outboard 2-cycle TC-W3 engine oil
Unconventional (Not ULSD compliant, may damage 2007 or newer systems)
HFRR 474, 162 micron improvement
200:1 ratio
16.64 oz/tank
$1.09/tank

8)Stanadyne Lubricity Formula
Lubricity Only
demulsifier, 5% bio-diesel compatible, alcohol free
HFRR 479, 157 micron improvement
1000:1 ratio
3.32 oz/tank
$1.00/tank

9)Amsoil Diesel Concentrate
Multi-purpose
demulsifier, bio-diesel compatible, alcohol free
HFRR 488, 148 micron improvement
640:1 ratio
5.2 oz/tank
$2.16/tank

10)Power Service Diesel Kleen + Cetane Boost
Multi-purpose
Cetane improver, bio-diesel compatible, alcohol free
HFRR 575, 61 micron improvement
400:1 ratio
8.32 oz/tank
$1.58/tank

11)Howe’s Meaner Power Kleaner
Multi-purpose
Alcohol free
HFRR 586, 50 micron improvement
1000:1 ratio
3.32 oz/tank
$1.36/tank

12)Stanadyne Performance Formula
Multi-purpose + anti-gel
cetane improver, demulsifier, 5% bio-diesel compatible, alcohol free
HFRR 603, 33 micron improvement
480:1 ratio
6.9 oz/tank
$4.35/tank

13)Used Motor Oil, Shell Rotella T 15w40, 5,000 miles used.
Unconventional (Not ULSD compliant, may damage systems)
HFRR 634, 2 micron improvement
200:1 ratio
16.64 oz/tank
price: market value

14)Lucas Upper Cylinder Lubricant
Gas or diesel
HFRR 641, 5 microns worse than baseline (statistically insignificant change)
427:1 ratio
7.8 oz/tank
$2.65/tank

15)B1000 Diesel Fuel Conditioner by Milligan Biotech
Multi-purpose, canola oil based additive
HFRR 644, 8 microns worse than baseline (statistically insignificant change)
1000:1 ratio
3.32 oz/tank
$2.67/tank

16)FPPF Lubricity Plus Fuel Power
Multi-purpose + anti-gel
Emulsifier, alcohol free
HFRR 675, 39 microns worse than baseline fuel
1000:1 ratio
3.32 oz/tank
$1.12/tank

17)Marvel Mystery Oil
Gas, oil and Diesel fuel additive (NOT ULSD compliant, may damage 2007 and newer
systems)
HFRR 678, 42 microns worse than baseline fuel.
320:1 ratio
10.4 oz/tank
$3.22/tank

18)ValvTect Diesel Guard Heavy Duty/Marine Diesel Fuel Additive
Multi-purpose
Cetane improver, emulsifier, alcohol free
HFRR 696, 60 microns worse than baseline fuel
1000:1 ratio
3.32 oz/tank
$2.38/tank

19)Primrose Power Blend 2003
Multi-purpose
Cetane boost, bio-diesel compatible, emulsifier
HFRR 711, 75 microns worse than baseline
1066:1 ratio
3.12 oz/tank
$1.39/tank

CONCLUSIONS:

Products 1 through 4 were able to improve the unadditized fuel to an HFRR score of 460
or better. This meets the most strict requirements requested by the Engine Manufacturers
Association.
Products 1 through 9 were able to improve the unadditized fuel to an HFRR score of 520
or better, meeting the U.S. diesel fuel requirements for maximum wear scar in a
commercially available diesel fuel.
Products 16 through 19 were found to cause the fuel/additive blend to perform worse than
the baseline fuel. The cause for this is speculative. This is not unprecedented in HFRR
testing and can be caused by alcohol or other components in the additives. Further
investigation into the possibilities behind these poor results will investigated.
Any additive testing within +/- 20 microns of the baseline fuel could be considered to have
no significant change. The repeatability of this test allows for a +/- 20 micron variability to
be considered insignificant.

I thought someone here said you could mix ATF in a tank of diesel? I have been putting a few quarts into a couple 100 gallons. I think ATF if high detergent. So it might keep things clean. dunno j

If you are willing to trash your fuel system, then go ahead and listen to a bunch of us antique tractor guys about this new fangled high pressure common rail fuel system. Yea dumpin in used motor oil, new motor oil, atf, acetone, 2 cycle oil, etc.. is a great idea. But when you go to your dealership and start begging for warranty on this system, you should be forth coming that you were experimenting with additives some antique tractor guys told you about. I am sure they will understand and be more than willing to replace them for free.

People say lots of things and often do so only based on a "hunch" or "heresay" or a good sounding Web posting.

When it comes to injection pumps, even people that work in pump-shops rarely know what causes, or what prevents wear. Some like to pretend to know, but often it's only their guess. I worked in a few shops and have a pretty good idea on how it goes.

The reality is, a mechanical rotary injection pump might last 1,000,000 miles before any major parts wear out, if it's run on good fuel with good lube. So, let's say you do something to cut that life in half. That's then 500,000 miles and the average person would never know the difference.

Add to that the myth of injector pumps being "rebuilt", and many people think that a new life begins once a pump is "rebuilt." It does not. Most pumps sold as "rebuilt" have very few new parts and the main parts have not been renewed in any way. A "rebuilt" pump might have most moving parts with 500,000 miles or 20,000 engine hours on them already. So, lets' say it craps out in 40K miles. How do you know what to blame the failure on?

So, some guy buys a "rebuilt" pump, it craps out in 100K miles, and he blames the fuel. That just adds to the confusion of the average person having no way to know what is going on and what really works. Then have some "professional" pump guy say what the cause was, and things get more convoluted.

For that reason, I try to rely on real metal-wear test specs done in controlled environments when they are availalble. Stanadyne, the U.S. Military, Lucas-CAV, et. al. have done several such tests. With lube additives, various types of vegetable oils, etc.

To be specific about ATF, it does add some lube - but buys very little protection per dollar as compared to other additives. Two-stroke-cycle oil is much more cost-effective.

Thanks JD I buy 2cycle oil bye the case, so I will put that in the diesel instead of ATF.

I've been buying mine in gallon jugs at Walmart. Seems to be one of the better deals around. Last summer I stopped at some little store in nothern Michigan. Filled the tank in my 94 Ford diesel and grabbed a quart of two-stoke oil off the shelf. When it came time for me to pay, I almost had a heart attack. $6 a quart for conventional Two-stroke oil. After that, I've made a point of stocking up when at Walmart.

Thanks for the data. I'm keeping that on file.