[jtaylor2005]

Hi All,

Has anyone ever considered using a biodiesel blend to increase lubrication and burn quality on these engines? Having looked at a few scientific studies it is often found that there is a huge increase in lubricity of the fuel when mixing 2-4% Biodiesel with regular diesel.

Note first in class on this scientific independent study

Lubricity Additive Study Results - Diesel Place : Chevrolet and GMC Diesel Truck Forums

and this one as well

http://biodiesel.org/docs/ffs-performace_usage/lubricity-benefits.pdf?sfvrsn=4

I am considering a 2-3% blend with regular diesel to help reduce fuel pump and injector wear. The only negative is when running strong mixes on a car with a DPF you can get the oil diluted by the biodiesel but I can't imagine that being a huge issue at a 2-3% blend! Only around 25%+

What do you think?

 

[jtaylor2005]

I have used 2 stroke oil before but I was looking at that and it came as number 7 on their list of improvements with a 162 micron improvement on the test compared to the 415 micron improvement found when using biodiesel mix. However Biodiesel was used at 1:200 but the 2-stroke was only used at 1:50.

I suppose the bonus of biodiesel is that it is actually a fuel so it replaces the regular diesel. Where as the 2-stroke is used as a sort of additive.

 

[jtaylor2005]

I've just read up on this 2 stroke mix, you are correct that 300ml is about right for a full tank, however, trials conducted also concluded that due to the Zinc content within the 2 stroke, this built up & compacted on the injectors giving up to a 6% reduction in fuel flow over 16hrs continual running?
They noticed a spike at 8hrs where they stopped the engine and started again from cold, they concluded that the shock from cold start possibly shifted the Zinc build up but this soon built up again?
There were no significant improvements in power or lubrication on a common rail injection system, final conclusion was that the additives within diesel these days fulfilled the criteria for protecting a Diesel engine with no need for other additives?

There has been one scientific looking trial. However to be honest out of my own experience with using 2-stroke oil in a common rail diesel Peugeot 306 I did notice it was quieter and also smoked a lot less surprisingly.

The thing is that the injectors in that car and the alfa currently were designed during a time when diesel was much more naturally lubricating. It had a higher sulphur content and since the needed to reduce sulphur has occurred a lot of people with older diesels have been struggling with the injector issues.

What I am going to do is trial it in this car. I am going to go for 500ml of 2-stroke oil (Which is low ash type so much less deposit causing and a lot less likely to cause DPF issues) It's a large tank so I don't see it being an issue at all to be honest.

I will then see how things go over the next few weeks and tank fill ups and document what I notice and any MPG and performance changes

 

[jtaylor2005]

Give it a go see what happens. A lot of diesel fellas swear by it! One thing to make sure is that the oil is mineral only and low ash stuff

 

[jtaylor2005]

Bought 5l of 2 stroke oil, and a mixing jug for £23 or so all in.

Just mixed up 300ml of 2 stroke and 300ml of diesel to make it easier to pour and then put it in the tank. Will top up my tank to the brim with diesel and then see how things go with the new concoction and report back.

 

[jtaylor2005]

Decent. This is what I bought though
http://www.ebay.co.uk/itm/COMMA-TWO...373359&hash=item337c92cd56:g:jOMAAOSwdvpWC5c4

 

[jtaylor2005]

My dad has a chainsaw that uses that level of 2 stroke so it'll get used eventually if worst comes to worst

 

[jtaylor2005]

Have you seen the sports pedals for sale - Would look nice in the wagon?

They look nice. Although for something that you pretty much never see that are tucked away down by the floor I don't think I would bother with the cost really. The ones I have now I am sure are pretty damn similar I think. Never really looked haha

 

[jtaylor2005]

It's not the same as in Petrol engines though what people forget is that in a diesel the fuel is being injected at quite a way over 300 bar through holes that are microns wide. The oil is atomized so finely it burns as good if not better than diesel anyway.

In a petrol it relies on the spark to light the fuel and oil and is only sprayed into the intake at a tiny pressure or even none at all in a carb engine! So you guy a lot less of the oil burning in a petrol.

 

[jtaylor2005]

That's good to hear! I have only done about 3 miles and most of that was with the music on haha so I didn't really notice. I am going out later so I will keep an eye on it then!

 

[jtaylor2005]

Can't say I have noticed any difference at all yet :/ however I haven't done one of my normal drives yet so have been driving a different style to normal. Do you reckon type / brand of 2 stroke would make any difference?