Two Stroke Oil in Diesel?

[cjmcb]

Hello, a "mechanically minded" friend of mine has suggested adding a very small quantity (100ml per tank) of two stroke oil into the fuel for diesel engines as he reckons it helps to lubricate things like the pump. Has anyone used or tried anything similar, if so what are the benefits if any?

[Gazwould]

Yes , it has to be mineral based JASO FB spec .

Semi and synthetic FC and FD don't dissolve well in the fuel and are more expensive anyway .

The oil brings additional lubricity to the pump and detergents and dispersants to keep the fuel system clean .

Being a petrol additive it must burn like petrol so it's molecules are first to ignite under diesels compression ignition then the diesel molecules follow , so this reduces diesels ignition delay ( diesel knock ) thus improving the fuels Cetane number .

The results are , quicker starting particularly noticeable from cold , quieter engine mostly noticeable at idle , less smoke out of exhaust as better combustion . Less carbon deposits in egr , intake manifold , turbo , etc .

More mpg , only a few .

You'll need more than just 100ml to a tank .


10 Litre Diesel ---> 50 Ml.
20 Litre Diesel ---> 100 Ml
30 Litre Diesel ---> 150 Ml.
40 Litre Diesel ---> 200 Ml.
50 Litre Diesel ---> 250 Ml.
60 Litre Diesel ---> 300 Ml.
70 Litre Diesel ---> 350 Ml.
80 Litre Diesel ---> 400 Ml.
90 Litre Diesel ---> 450 Ml.
100 Litre Diesel ---> 500 Ml.

[Johnny31]

Hello, a "mechanically minded" friend of mine has suggested adding a very small quantity (100ml per tank) of two stroke oil into the fuel for diesel engines as he reckons it helps to lubricate things like the pump. Has anyone used or tried anything similar, if so what are the benefits if any?

Try it, as long as he accepts to swallow the bill for injectors, DPF and probably few other bits and bobs...

Sent from my mobile...

[Gazwould]

Lol , it helps these parts .

Less smoke is less soot for dpf to deal with etc .

For instance it's very rare for 1.9 tdi 130 injectors to fail even at our high mileages , I'm at 180K and have been using it religiously for 4 years , others for longer .

In Sweden , 30+years .

[Johnny31]

Lol , it helps these parts .

Less smoke is less soot for dpf to deal with etc .

For instance it's very rare for 1.9 tdi 130 injectors to fail even at our high mileages , I'm at 180K and have been using it religiously for 4 years , others for longer .

In Sweden , 30+years .

nice read here: 2-Stroke Oil In Diesel – A Technical Study

If you cannot read the full article, here are the conclusions:

Based on the results of this study, the following conclusions are drawn:


At a 200:1 volumetric blending ratio, 2-stroke oil has a negligible effect on diesel lubricity.
All diesel fuel sold in South Africa has to meet the SANS 342:2014 lubricity specification to ensure the proper protection of diesel fuel pumps and injector systems.
The low sulphur diesel products sold by Sasol contain lubricity improver additives which are far more effective than 2-stroke oil.
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.
The abovementioned results should hopefully clear up many of the public misconceptions around the use of 2-stroke oil in diesel and highlight why both oil companies & engine manufacturers do not recommend the addition of any after-market additives, ie. 2-stroke oil, to the fuel tank. It is also good advice to use fuels from reputable outlets backed up by the technical support of a competent fuel company to enable the best engine performance and durability.

[Gazwould]

Classic mistake , this is a study into semi synthetic JASO FC that doesn't dissolve and burn completely , that's why we use mineral JASO FB .

[A6S]

Thought this 2 stroke thing only applies to old school diesels and not modern ones. Fuel quality today is a lot better than crappy diesels we used to have so there’s little point.
It’s similar to using redex every tank, doesnt do much.
My old pd did almost 180k on Tesco’s no frills diesel and if it wasn’t written off I reckon it still be going.

[B5NUT]

My old A4 with 340,000 mile on the clock is still going, and never had any additives in the fuel, still on the original injectors & fuel pump. Completely pointless sticking oil or any additives that are not already added by the fuel manufacture.

[Gazwould]

There you go you haven't tried and you would notice .

In this world there are those that think because something is a standard , is made / produced by the manufacturer therefore it can't be improved .

Oem suspension - Eibach
Oem ecu map - Remap
Std halogen lights - upgraded halogen , HID , LED .

Fuel - definitely .

Cetane number is not disclosed at diesel pumps like Octane is with petrol , a genuine cetane booster is 2-EHN ( 2-Ethyl-Hexyl Nitrate ) . But 2 Stroke has a cetane improvement effect at a cheaper price , I saw years ago a test with other off the shelf cetane boosters , some worked others didn't , 2 Stroke , did .

[B5NUT]

What am I supposed to notice on an engine with 340K miles? The car does not smoke, the cam's & cylinders are all in good condition. Start first time every time.