Using 2 stroke oil in diesel

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S1monm

Active Member
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I have read many threads about using 2 stroke in a diesel so I thought I'd have a go. I will keep this thread updated regularly and just keep to the facts.

My car is a 2006 TD4 it has done 230000 miles. I had it remapped to 130 hp a year ago. Due to the remap it does smoke under hard acceleration. It also gives out a bit of blue smoke when started in the morning.

So, I added a litre of FD spec 2 stroke oil and filled the tank with regular diesel. I have done 400 miles since and still have a quarter of a tank left, this has surprised me as I usually get through a tank every 400 miles. I haven't changed my driving style and don't hang around, I reckon I should get another 80 odd miles out of it. I will keep track of the MPG over a longer period so I can average it out. I can do up to 1000 miles a week so should be getting through a couple of tanks a week. If it has actually made my MPG better this will offset the £10 for the 2 stroke, I'm just putting in the whole bottle.

The engine seems smoother and a bit more powerful but this may just be a placebo effect...One thing that has definitely happened is the smoke has been drastically reduced. Before using the two stroke oil under hard acceleration there would be huge amounts of black smoke, this has now been reduced to just a small amount. It now doesn't smoke on start up, even when it was minus 2 the other morning. So I can definitely say it does reduce smoke.

The engine has a different sound, again this may just be in my mind but I'm sure it sounds less rattely from a cold start.

So there you have it, I will keep the thread updated regularly.

Cheers

Simon
 
You need a better remap if it's smoking after a map!
The ratio of 2 stroke is meant to be something like 250:1, or 200-250ml per tank, not 50:1

Also meant to use low ash mineral oil, not 2 stroke engine oil, they're very different things
 
SES88 said:
You need a better remap if it's smoking after a map!
The ratio of 2 stroke is meant to be something like 250:1, or 200-250ml per tank, not 50:1

Also meant to use low ash mineral oil, not 2 stroke engine oil, they're very different things
Click to expand...

I am using FD spec two stroke which is ultra low ash part synthetic. The general consensus is to use an FC spec oil, FD is the same but contains more detergents. I am running 1 litre through 3 tanks and then will reduce it down to 300ml per tank.

Cheers

Simon
 
I stopped using 2-stroke oil a long time ago. I use Diesel Rhino. Much better. Google it.

There is a very long thread already in this section on using 2-stroke oil. Consensus was low ash mineral 2-stroke oil. I used Halfords garden tool one before I stopped.

Diesel Rhino does a much better job.
 
Epicuser said:
I stopped using 2-stroke oil a long time ago. I use Diesel Rhino. Much better. Google it.

There is a very long thread already in this section on using 2-stroke oil. Consensus was low ash mineral 2-stroke oil. I used Halfords garden tool one before I stopped.

Diesel Rhino does a much better job.
Click to expand...

Yeah I have seen some good reviews, might give it a go
 
It must be mineral oil. Semi or full synthetic doesn't burn, which counteracts the reason for using 2 stroke oil in the first place.
I use a 200 to 1 ratio in my Discovery 3. It makes no real difference to the mpg, but the engine does sound and run nicer than on plain diesel.
 
Last edited:
Diesel Rhino and Millers are both Cetane Boosters with added detergents. They'll clear up injector issues and help with a small power boost. I tend to use V-Power instead, but keep a bottle of millers in the car in case I can't fill up at Shell.

From what I can work out, adding 2T oil is more about de-carbonising and slower flame front development (retards ignition so no knock and less injector chatter). I've run my Disco3 TDV6 for 135,000 miles from new and started adding 2T at 50,000 miles after my HPFP gave up (warranty covered it). I've never had an EGR problem, unlike many, and am anticipating easier removal of the glow plugs when they give in, again unlike many. The only downside is that the Webasto Fuel-Burning Heater doesn't like it - in very cold weather ( -17C ) it had a couple of flame-outs and then wouldn't restart on the purge cycle until I ran a couple of untreated tanks through.
 
"The only downside is that the Webasto Fuel-Burning Heater doesn't like it - in very cold weather ( -17C ) it had a couple of flame-outs and then wouldn't restart on the purge cycle until I ran a couple of untreated tanks through."

I had exactly those symptoms Nodosh,hence I stopped using it in my TD4.
Shame as it did run smoother and quieter.
 
webley2000 said:
"The only downside is that the Webasto Fuel-Burning Heater doesn't like it - in very cold weather ( -17C ) it had a couple of flame-outs and then wouldn't restart on the purge cycle until I ran a couple of untreated tanks through."

I had exactly those symptoms Nodosh,hence I stopped using it in my TD4.
Shame as it did run smoother and quieter.
Click to expand...

That's because by adding two stroke you're also raising the flash point and lowering the combustobility. Fuel company additives are injected at app 1000 parts per million, therefore leaving the flashpoint more or less the same as the base fuel.
 
To keep the thread updated:

First tank - 497 miles using 57 litres of fuel.
Second tank - 498 miles using 55 litres of fuel.

No smoke and engine seems more eager to rev. So I'm happy. Will update after next tank of fuel and also have MOT next week so will be interesting to see emissions.

Cheers

Simon
 
Epicuser said:
In my auto around London I get around 400 or so on similar litres.
Click to expand...

Sounds good for stop start driving. My driving consists of a 50/50 mix of A and B roads and farm tracks/off road tracks that lead to the sites I visit. It also idles a lot at this time of year, I don't like being cold!
 
Business as usual:

20141219_120645_zps01fbf532.jpg


Only got 427 miles from 56 litres but did a fair bit off road. Lots of floods in Mid Wales.
 
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