Ok, So I dug back and found the old posting saying TC-W3 2 cycle oil isn't good..
Mind you...this study is out of South Africa.
Join Date: Mar 2008
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: