I've been running with a fuel additive mixture of Power Service and 2 cycle oil...
I buy a gallon of 2 cycle from Walmart, and 1 Qrt. of Power Service, and mix them at a ratio of
approx. 6-7 oz. of Power Service to approx. 26 oz. of 2 cycle oil...
I add a quart to the diesel fill up every time I get a 1/2 a tank or more in a 44 gal. tank...
I've been doing that now for over 150K/miles, and the truck seems to be running pretty good with 262K/miles on it
The question I have, is that I'm still on the original factory injectors, and just wanting to know
what you think I can expect now, for my remaining fuel injector life...Any comments would be appreciated
Thanking you in advance
Tony, although you are not experiencing issues currently, I would advise against adding oil to your fuel, even 2-stroke. The truck is designed with diesel fuel to be burned in mind. Especially if this truck is your "baby" its not worth taking the potential I'm sure you have seen others mentioning the possible issues it may cause. Power Service as an additive has been shown to increase lubricity in operating injectors during lab testing. However, running bio-diesel even with as little as 2% has also been shown to significantly increase lubricity in injectors and probably costs less than Power Service. Unfortunately that's all that power service has been shown to do as a benefit when testing it's treated diesel fuel. It does not have any cleaning agents even though they claim to do so but it does boost cetane, so if your happy keep using it. Your 1qt of 2 stroke oil in 22 gal of fuel is 1:88 essentially 1:100 (1%) and probably wont hinder your operation to speak of. Your 6oz of Power Service in 22gal is 1:500 so your treat ratio is high for a half tank so fill'er up!
Why do you guys use "2 stroke" oil for injector lubrication?
Why not 4 stroke oil, or transmission oil, or mineral oil, or canola oil, or Oil of Olay?
What specifically is it about 2 stroke oil that appeals to you for your homemade fuel lubricity "additive"?
Obviously I'm being facetious about the other oil alternatives I mentioned above, but in all seriousness, if injector life is the principle concern, and if you do not trust the lubricity of pump diesel... why not use a lubricity additive formulated for the purpose?
All the forum posts in the world about what people put in their tanks, and how long their injectors lasted as a result... amounts to dubious anecdotal speculation. Outside of a laboratory controlled comparative environment, using some semblance of scientific method, it is not possible to determine what benefit, or detriment, that adding 2 cycle oil to the fuel does to increase or curtail injector life.
An energy company in South Africa decided to put 2 cycle oil laced fuel to a test in a laboratory environment, just to try and apply some measurable data and science to all the anecdotal feel good claims that people make. The link to this report is below, but here is a summary of a few key points:
- The results of the study support a view that the practice of dosing diesel with 2-stroke oil is surprisingly ineffective in terms of lubricity and cetane improvements.
- Engine performance, fuel consumption and emissions were unchanged.
- Trace amounts of zinc, an element which is found in most 2-stroke oils, are well known to cause injector nozzle fouling.
- The study measured high levels of injector fouling when the test engine was running on diesel dosed with 2-stroke oil.
- The use of 2-stroke oil in diesel is potentially harmful to modern diesel injection equipment.
Based on the results of the study, the following conclusions are drawn:
- At a 200:1 volumetric blending ratio, 2-stroke oil has a negligible effect on diesel lubricity.
- At a 200:1 volumetric blending ratio, 2-stroke oil has a negligible effect on diesel cetane number.
- No measurable effect on all other regulated diesel properties was measured at a 200:1 dose of 2-stroke oil in diesel.
- 2-stroke oil can contain around 16ppm zinc, or higher depending on the formulation and batch.
- Trace amounts of zinc in diesel are known to rapidly accelerate injector nozzle deposits.
- Engine test results show that a 200:1 blend of 2-stroke oil in diesel results in a 2% loss of engine power in a 16 hour test due to injector fouling, a risk that would apply to any common rail diesel engine, but could also worsen fouling in older engines.
- Vehicles fitted with a diesel particulate filter (DPF) in the exhaust system could experience reduced DPF life due to the collection of ash and metal based contaminants in the filter over time with the continued use of 2-stroke oil.
And here is the link to the full study:
Thank you for finding that study NYB!
IF YOU RUN A DPF SYSTEM ON YOUR TRUCK DO NOT PUT 4 STROKE ENGINE OIL/ATF/EXC. IN YOUR FUEL! These fluids contain metal lubricant and anti-wear, anti-friction additives that contain....ASH! ASH DOES NOT BURN! IT COLLECTS IN YOUR DPF SYSTEM AND STAYS!
I agree with the supported results from the study, 2 stroke oil may burn ashless and may not hinder the operation, but at 200:1 it also cannot provide any benefit and probably wont at higher treat ratios.
I agree that its negligible, I agree that outside of a lab setting its tough to provide sound proof and reasoning. (Glad I get to work in an automotive petroleum lab).
The oleic/canola oil add is actually not too far off base when you consider bio-diesel and what it is comprised of
I wonder what brought them to decide to do such an elaborate test???
Did they read my posting here ???
Why did the decide to pick 2 cycle oil, instead of 4 cycle or anything else [ATF]. ???
Gruapp, they probably picked it because that is what was "trending" at the time, see above for reasons why not to use 4cycle or ATF.
atleast 2 stroke oil is meant to be burned.
most of the issue appear to affect common rails and we don't have dpfs to worry about.
If used in concentration that most of us do it adds 70 ppm of lubrication.
Most people add it cause it's cheap .
I'll find the test they did in Europe that shows fuel economy increase. And some positives.
And from what I understand the injector nozzles usually last 400-500k miles.
Injectors are replaced because of poppet valve wear long before that.
Blue, agreed, glad to be DPF-free, can I get an Amen?! For the OP he is adding 26 oz to 44 gallon then yes he is at the 70ppm mark, but any less fuel bumps it up. And that's 70ppm of 2 stroke oil that doesn't necessarily mean it adds lubrication once it hits the injector at X-hundreds of psi as it may act differently outside its standard operating pressure (outside in 2 stroke applications). Agreed, most people do it because its cheap, essentially cheap fuel. #1 failure of high pressure diesel injectors is the needle and seat if that's what you are referring to. -ask BOSCH/Motorcraft
2 stroke is made to run through the combustion process. engine,trans. oil etc tries to resist burning.
Modern 2 stroke is oil injected independently and not run through injectors. It is mixed with gas when some carborated engines are used such as weed wacker and snow blowers.
The the jetting of the carb is adjusted to make up for the fuel that is displaced by the oil. Too much oil and you can lean burn a 2 stroke engine. that why the engine has a mix ratio on it.
Mixing 2 stroke with Diesel seems like a bad idea since much of the oil does not burn fully. 2 stroke exhausts are super dirty because of that oil residue. Turbo's, DPF and other exhaust components will not like 2 stroke residue hanging all over them. I prefer to stay clean and use an additive made for diesel.
Sound Like a great idea, but it's not!
Justus, you may find that Arch oil alleviates and prevents stiction in your injectors as it does indeed increase lubricity but will not protect metal components from oxidation or corrosion. Its performance also significantly drops off in HPCR systems found in newer diesel applications. (5,000-30,000psi)