2 Stroke in Diesel. Test car - BMW 320d.

[MarJay]

I think its a waste of two stroke oil TBH. I'd rather use it in one of my two stroke bikes.

[anonymous-user]

If the engine really has got "quieter", then that suggests that the oil has actually slowed the burn rate. (in a diesel, the fuel is directly injected and burns immediately on injection, this produces a pressure wave, which is the typical diesel "knock" you hear.) If the burn rate has slowed, then you are burning the fuel at a larger cylinder volume and the engine efficiency has fallen........


(you haven't remapped the ecu, so the pre/main/post Qdot's are the same, and the injection angle is un-altered)

Basically, the noisier a modern CR diesel is, the more efficient/powerful it is. This is the trade off between combustion noise and peak efficiency inherent in all diesel powertrain calibrations.

Also, i am a little confused as to exactly what "deposits" you are trying to remove? UK pump diesel has detergents already in it?

[Adam205]

Try sawdust in the gearbox too, quietens it down a treat...

[redgriff500]

Max_Torque said:

Also, i am a little confused as to exactly what "deposits" you are trying to remove? UK pump diesel has detergents already in it?

I know that the Bio I run my T4 on removes all the slimey black stuff that diesel has left in the tank / lines.

Problem with all this stuff (additives / bio etc) it's hard to get good info.

[anonymous-user]

redgriff500 said:

I know that the Bio I run my T4 on removes all the slimey black stuff that diesel has left in the tank / lines.

er, are you sure you're running the car on Diesel and not on coal??? ;-)

this is diesel:



not a lot of slimey black stuff in there!

[Rubin215]

Adam205 said:

Try sawdust in the gearbox too, quietens it down a treat...

It's a bd to get in though.

Not that I ever tried it when I was younger with a 120K Peugeout 405 ex-private hire taxi I needed to sell quickly you understand...

[redgriff500]

Max_Torque said:

redgriff500 said:

I know that the Bio I run my T4 on removes all the slimey black stuff that diesel has left in the tank / lines.

er, are you sure you're running the car on Diesel and not on coal??? ;-)

this is diesel:



not a lot of slimey black stuff in there!

I can tell you're not a mechanic.

Take any older diesel car, remove sender unit from tank, put your hand in and wipe the sides - tell me what you find.

[300bhp/ton]

Max_Torque said:

If the engine really has got "quieter", then that suggests that the oil has actually slowed the burn rate. (in a diesel, the fuel is directly injected and burns immediately on injection, this produces a pressure wave, which is the typical diesel "knock" you hear.) If the burn rate has slowed, then you are burning the fuel at a larger cylinder volume and the engine efficiency has fallen........


(you haven't remapped the ecu, so the pre/main/post Qdot's are the same, and the injection angle is un-altered)

Basically, the noisier a modern CR diesel is, the more efficient/powerful it is. This is the trade off between combustion noise and peak efficiency inherent in all diesel powertrain calibrations.

Also, i am a little confused as to exactly what "deposits" you are trying to remove? UK pump diesel has detergents already in it?

If that's true. Then why do diesels tend to be a bit quieter when run on vpower diesel? Also noticed a LR TDI is quieter, smoother and feels more powerful on veg oil.

[calibrax]

redgriff500 said:

I can tell you're not a mechanic.

Take any older diesel car, remove sender unit from tank, put your hand in and wipe the sides - tell me what you find.

Or take out your EGR valve for a look... this was mine (BMW 2 litre diesel)

[IceBoy]

What?!

I wouldn't put anything in my tank.

Just my opinon.
IceBoy

[Classic Grad 98]

Ice Boy- I strongly recommend that you periodically fill the tank with the appropriate fuel if you plan to continue enjoying reliable, trouble-free motoring

[Rammy76]

Classic Grad 98 said:

Ice Boy- I strongly recommend that you periodically fill the tank with the appropriate fuel if you plan to continue enjoying reliable, trouble-free motoring

[IceBoy]

You know what I mean!! LOL

Iceboy

[anonymous-user]

calibrax said:

redgriff500 said:

I can tell you're not a mechanic.

Take any older diesel car, remove sender unit from tank, put your hand in and wipe the sides - tell me what you find.

Or take out your EGR valve for a look... this was mine (BMW 2 litre diesel)

Perhaps you'd like to explain the mechanism required for a fuel detergent to "clean" your egr valve?

[Classic Grad 98]

I do agree though, my car just gets Shell diesel and nothing else. After all, it'd be quite apparent from the engine's performance and efficiency if it was suffering with dodgy injector spray patterns. Using a more viscous additive to clean the super fine nozzle heads seems counter-intuitive anyway.

[anonymous-user]

300bhp/ton said:

If that's true. Then why do diesels tend to be a bit quieter when run on vpower diesel? Also noticed a LR TDI is quieter, smoother and feels more powerful on veg oil.

Who says they run quieter on Vpower? You? or A bloke down the pub/on the internet, and show me the in-cylinder pressure trace to back up your claim?

if we are talking about "general" pub talk quieter, i could name you probably 10 things that would change the combustion noise from day to day with a greater effect than the fuel you put in your car! But of course, the internet is full of people carrying out scientific, accurate and repeatable non biased tests of just such things...... er Not! ;-)

I on the other hand calibrate diesel engines (amongst other things) for a living, and i make a very good living doing just that. However, it's your car or whatever, so please be my guest,go right ahead and stick any old stuff you like in the tank if it makes you feel better

Edited by anonymous-user on Monday 21st November 22:22

[ZeeTacoe]

redgriff500 said:

Max_Torque said:

redgriff500 said:

I know that the Bio I run my T4 on removes all the slimey black stuff that diesel has left in the tank / lines.

er, are you sure you're running the car on Diesel and not on coal??? ;-)

this is diesel:



not a lot of slimey black stuff in there!

I can tell you're not a mechanic.

Take any older diesel car, remove sender unit from tank, put your hand in and wipe the sides - tell me what you find.

Diesel?

[redgriff500]

ZeeTacoe said:

redgriff500 said:

Max_Torque said:

redgriff500 said:

I know that the Bio I run my T4 on removes all the slimey black stuff that diesel has left in the tank / lines.

er, are you sure you're running the car on Diesel and not on coal??? ;-)

this is diesel:



not a lot of slimey black stuff in there!

I can tell you're not a mechanic.

Take any older diesel car, remove sender unit from tank, put your hand in and wipe the sides - tell me what you find.

Diesel?

Sometimes its better to type nothing...

than demonstrate your ignorance.

[NHK244V]

Bio does clean out the pipes and tank, every time i run a new motor (new to me i only run oldys) on bio for the first time it deposits black crap in the filter and usually requires 2 or 3 filters before the system is clean.
What the black crap is i have no idea, where it comes from i have no idea but it's there and bio shifts it like no nothing else, as a mechanic i can support the statement that old diesel tanks are usually full of crap way more than a petrol tank, i beleive it a mould but thats just a guess ???
that's the is the black crap real of fake issue coverd

2 stroke i find works better in older engines, older engines that were designed to run on high sulpher diesel (which no longer exsists) it's the pump and injectors it quietens not the combustion knock as far as i can tell cos it's way better as i say on older engine and it get more power the older the engine IME
I can well remember the huge amount of transits that sufferd from pump failier when low sulpher fuel came out, on our fleet where i worked we lost 40% of transit Dis in the first year to pump issues, lucas pumps really like to be lubed well which is one of the reasons the fail with SVO or WVO (they are pretty weak internaly)
I run all my old diesels on 75% dino 25% SVO and 5mil 2stroke per litre of fuel, it gets me more MPG and quieter and smoother running engine and less smoke oot the tail pipe.
Newer stuff doesn't really need it cos they were designed with the new fuel in mind'
It's sort of like running a leaded car on unleaded, things wear and you have to take steps to stop that wear but as with the old argument of to use lead additives or not a lot depends on driving style and use.


Edited to say all my older diesels use lucas pumps hense the low SVO content as the seals leak with 50/50 in the summer

edited again cos i can not speel for toffee !! and to add this link i was looking for

http://www.dieselpowermag.com/tech/ford/0911dp_fue...


and yes i spelt spell wronge deliberatly (twas the only deliberate one though )

Edited by NHK244V on Monday 21st November 23:51

[ZeeTacoe]

redgriff500 said:

ZeeTacoe said:

redgriff500 said:

Max_Torque said:

redgriff500 said:

I know that the Bio I run my T4 on removes all the slimey black stuff that diesel has left in the tank / lines.

er, are you sure you're running the car on Diesel and not on coal??? ;-)

this is diesel:



not a lot of slimey black stuff in there!

I can tell you're not a mechanic.

Take any older diesel car, remove sender unit from tank, put your hand in and wipe the sides - tell me what you find.

Diesel?

Sometimes its better to type nothing...

than demonstrate your ignorance.

And yet here you are after 3500+ posts.


So oh wise master what will be in the fuel tank of a car that has only ever had fuel in?