Petrol/Diesel Mixture

[jmp]

Re: why bother with paraffin?

Don't know. The chap wirth the kerosine saved me a fortune I had just paid 3quid or so for 4litres at a garage. Needed some for my cabin heater!

He did not mention other than that in their operation they just add to the diesel in the tank.
I beleive the operation is quite large ,but currently can add no more.

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[vyv_cox]

Re: so the petrol magically

You're putting words into my mouth. The vehicle had all the symptoms of a partially blocked filter, i.e. would tick over and run slowly with no power. Sitting at tick over for a few minutes would warm the filter bowl a little and it would then run better for a while, presumably until more cold fuel came through.

The Cummins Diesel website refers to petrol additions to diesel. Apparently it only lowers the cloud point by about 4 degrees and may cause other problems, so they warn against it. No doubt there are many better ways now but it overcame a problem for me.

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[stubate]

what i dont understand is the

willingness of people on this panel to listen to claptrap and myths. simply put, crude oil is a substance that can be split up into different fractions having different viscosities and flash points. if you could all look at it from afar you would see that, simply speaking you can split it up or join it back to get the desired characteristics, paraffin mixed with lube oil is in effect diesel fuel, that mixing petrol with diesel fuel increases its "octane" rating along with decreasing its viscosity. there is nothing inherently "dangerous" about mixing petrol with diesel, it doesnt all of a sudden lie lurking there waiting to explode, it just forms a liquid with slightly different characteristics. it doesnt lie there separately "gassing" up it becomes an integral part of the liquid.
stu


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[PeteMcK]

Re: well how does it "work " then

I know perfectly well how it works; so, presumably, do you, so I'm not going to be patronising about it. On the other hand, if you need me to explain the inference of my point in conjunction with the one above it, a diesel cylinder never sees fuel half way up the compression stroke, so what's that got to do with it? (And that question's rhetorical.)


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[stubate]

the point i am trying to get across

is that whilst the timing is fixed in a compression ignition engine, the addition of lighter fractions alters the "octane" rating of the fuel and consequently the fuel "explodes" instead of burning in a controlled manner and will give the same effect as pinking does in a petrol engine.
that is why when you put neat petrol in a diesel engine it runs rough and can cause damage to the combustion areas, the same as happens in a petrol engine when it pinks or detonates.


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