2 Stroke Oil mixed with Diesel

[Krarl]

So for the last 4 months I’ve been using a mix of diesel and 2 stroke oil in my dCi 100

I’d heard mixed reviews and info about this before and also what sort of amounts people used. Some of the benefits I heard about were;

-Quietens engine vibrations
-Smoother running
-Lubricates the high pressure pump properly (new diesel fuel apparently has less lubricants in it when compared to what it used to be like)
-Car feels more responsive and less chuggy
-Less smoke out of the exhaust
-Increased MPG

I started using this just to see what it did, I used 250ml in my first tank and after first tank I’d already started to see a small difference as there was less smoke coming out the back of the car. Now being a 1.5 there wasn’t a hell of a lot to begin with but it was significantly less! I also noticed the car was quieter, I really wish I’d used my decibel-meter to measure before and after and then continue to do it after each tank of fuel to see if it got better with proper results!

However, I’m a mong and didn’t think that far ahead![emoji23]

Now after 5,000 miles and roughly 7/8 tanks of fuel I can honestly say the car feels a hell of a lot better! I’m not sure if this is just placebo but I’ve noticed the obvious decrease in smoke, the car is quieter, it idles a lot smoother and I’ve also noticed that on a run it will do slightly better MPG than before.

I used to average around 65mpg but this was 80% motorway driving at 60mph, I’m now no longer at uni and do 75% A road driving which is littered with traffic lights. I now get 60mpg which is considerably less. However, on a long run the car will do 73mpg at 70mph, around 85mpg at 60mph whereas before it would be doing around 65-70mpg at 70 and 80mpg at 60mph. This can’t be fully tested as I don’t have any tests that I did before as this was just one of them things that “I thought I’d try out”. It might just be that I’m taking more control and care over my mpg now, whereas before I might have been just glancing at my mpg and not really caring too much. Also, I don’t really care for my mpg too much, just when I’ve been seeing if the oil has been making any difference.

Overall I can’t see any harm being done to the car but it’s completely on your head if you do try it as I’m just giving my judgement and views on it. It may work for my car but may harm the next persons car so try it at your own risk.

Anyway, I opted to use 250ml of 2 stroke oil per tank which was sort of advised as people say around 300ml to 60l of diesel. I just found it handy as I have a redex bottle of which is 250ml and fits into the neck of the tank perfectly. My tank is around 50l too so a bit more or a bit less won’t hurt I suppose lol

This is the stuff I’ve been using, it’s around £18 iirc so not a pocket breaker at all. I’m less than halfway through this so this whole 5l bottle should last me a year I reckon.

It’s red in colour but you can’t see that when it’s heavily mixed with fuel and doesn’t show in the fuel lines either.

I know lots of you have daily drivers aside from your Clio’s so this may be of some use to you all.

Admin if this is in the wrong section please advise

Cheers for reading,
Kyle


Sent from my iPhone using Tapatalk

 

[R3k1355]

I used 2-stroke in my old 306 when running veg. 1:200 ratio is what I used, did run abit better and noticeably quieter.

I was told fully-synth was the best oil to use?

 

[Cain]

I used to do the same in my 306, though it made an absolute ton of smoke due to the old school allen key remap it had ?

I didn't used to notice much improvement on noise as the 306 was so loud anyway, but i do think it made it slightly smoother. I used to find it really didn't like supermarket diesel.

 

[Krarl]

You ran this in D-turbo’s?[emoji23]

Just run them on old engine oil and chip fat, that’s one thing you can’t get away with on a common rail. Especially dCi’s as they’re so picky with fuel!

 

[R3k1355]

You ran this in D-turbo’s?[emoji23]

Made starting abit easier as well.
Veg doesn't lubricate as well as diesel so running 2-stroke kept the pump and injectors happy (and quiet)

 

[bloke]

Two strike oil isn't designed to lubricate the pump, regardless if what anyone says it will lead to pump issues.

Had a link to an article about it, will see if i can find it.

 

[PhillipM]

I'd like to read that, it was common to run 2 stroke oil through pumps for motorsport use when they took all the sulphurised lubes out of diesel for a while, I'd be amazed if there's any sort of issue with it given it's designed to run through pumps anyway.

 

[Krarl]

I also like to read that

2 strike oil is used in strimmers, bikes etc to stop a lot of piston wear. I don’t get how it would lead to high pressure pump failure? Plus even if that did happen I have about 6 spare anyway[emoji23]

 

[bloke]

Two stroke is designed to be pumped to mix with fuel, never looked at pump pressure but it won't be much at all, couple of psi? High pressure diesel pump 1,500psi, slight difference.

 

[Krarl]

Yeah its about 1600 psi iirc. But the thing is my high pressure pump is designed to work with sulphur diesel, which is higher ppm than non-sulphur diesel that has now come about to help with the dpf and environmental b****cks. All I've done is substituted the 2 stroke oil in for the sulphur, tbh if I made a mix up of my diesel and oil and got the ppm tested then I reckon it would be less than old style sulphur diesels.

High pressure pumps from 2010 onwards are probably designed to be used in conjunction with sulphur free so it might be hit and miss with them if you put 2 stroke in.

So far all I'm seeing are benefits for my car and if it blows up I have a spare engine, a few pumps, injectors, fuel tank, lines and anything else than can be thought of lol

 

[Landyman]

The arguments for/against adding two stroke oil to diesel have raged for years. I encountered it on the Transit forum and the Land Rover forum.
The trouble is, you’ll get no definitive answer.
Some say it’s great and quote a German study that says it’s just what you should be doing to make your engine last longer and run better.
Others will quote a different report that not only says it is not necessary, but that it will damage your fuel system.
The only thing to do is try it and see if it makes a difference. I tried it in my Transit Connect and it was inconclusive. I also tried it in my Defender TD5 and it may have been a bit quieter.
But then my local Land Rover specialist advised against it in no uncertain terms, claiming that it would wreck the high pressure diesel pump.
So l gave up and stopped using it in my fuel.

 

[Landyman]

http://www.fuelexpert.co.za/2-stroke-oil-in-diesel-technical-study.php

https://www.audi-sport.net/xf/threads/2-stroke-oil-and-diesel.48309/

 

[Krarl]

Yeah it's the same with everything though. Some people say it's good and some scream that it's bad

The thing is that most people would be using this in their £500 daily like me, so even if it does go bang it's not something that I'd cry over. Wheras using this in a LeMan Audi with a V12 TDI might be a bit nervy

 

[Dr HMS Derv Destroyer]

IMO never had a problem with running two stroke.

Always ran 2 stroke low ash mineral through all the diesels I've got, including the track derv. Not had one fuel related problem in the 5 years 100K miles I've clocked up between them all

 

[Krarl]

Knew you'd join in on the fun as soon as derv was mentioned lmao

Might get my dad in on it and try to run some proper tests on his 1700 derv Astra

 

[Brigsy]

Always meant to try some in my dci. Only been putting the odd tenner in the tank recently though not doing any mileage

 

[Krarl]

Always meant to try some in my dci. Only been putting the odd tenner in the tank recently though not doing any mileage

Because you're always in the van

 

[bloke]

http://www.fuelexpert.co.za/2-stroke-oil-in-diesel-technical-study.php

think that was the one i was thinking of?

 

[DrR]

I’ve never heard of this!

My Saab’s on 134k, doesn’t smoke at all unless it’s doing a DPF clean. Sounds like a proper ratler of a diesel though.

 

[Rystar]

Used to do this in a MK4 golf non-pd diesel (the 90bhp turbo) was noticeably smoother and engine had a quieter note to it so was a plus for me

 

[Krarl]

think that was the one i was thinking of?

Seems like a good test but anyone could have written that up. Needs specifics like what type of injection system, Bosch/Delphi/Lucas etc

Needs testing on more than just 1 car too

 

[Goodj]

Couple of relevant vids

 

[botfch]

If its a cheap car and it makes it run better its a no brainer.

 

[R3k1355]

If it's that much of a problem where are all the people with shagged fuel pumps??

Not had one fuel related problem in the 5 years 100K miles I've clocked up between them all

I put similar use through my old 306's, ran veg and also had the pump and turbo turned up.

Fuel injection system was the only decent thing left on the cars by the end.

 

[Landyman]

Here’s a report that that’s a bit more specific.
I think that generally in older vehicles it’s OK.
If you think it improves the running of the engine then do it. But it seems the more modern high pressure pumps are more of a problem.

https://www.baileysdiesel.com/on-hi...stroke-oil-diesel-modern-common-rail-engines/

 

[Dr HMS Derv Destroyer]

The dilution ratio of it ( 50L of derv to 300ml of 2T) isn't nowhere near enough to cause common rail damage.

Fair enough , old systems ( mechanical and electo mechanical ) will run it easy enough as those pumps don't run such high tollerences.

Need to do a test really on a car I haven't been using it in

 

[Landyman]

Somebody commented that they found “pools of two stroke oil” in the bottom of diesel tanks, so l am going to do a mix test to see how it mixes with diesel fuel.
I will report back.

 

[Krarl]

I very much doubt that, would be good to see if there is any separation

Even if it did separate wouldn’t the 2 stroke be at the top as it’s density is lower? And I’ve never seen any of my 2 stroke and petrol separate but I understand petrol and diesel are different altogether.

Plus they’re both miscible liquids so they mix anyway, it’d be like mixing water with orange juice. I look forward to the test though. Might have a bash myself

 

[R3k1355]

Somebody commented that they found “pools of two stroke oil” in the bottom of diesel tanks, so l am going to do a mix test to see how it mixes with diesel fuel.
I will report back.

Sounds like total rubbish, the fuel pump(s) and motion of the fuel being sloshed around when the vehicle is moving will have mixed the two pretty well.
If the two have different density/weights they might separate (in theory) over time, but it might need to sit for like a year?

Add one fluid to the other, give it a shake and you won't end up with 'pools' of the stuff.

 

[Landyman]

http://www.jatonkam35s.com/DeuceTechnicalManuals/Diesel_fuel_additive_test.pdf

 

[dervman63]

"Two stroke is designed to be pumped to mix with fuel, never looked at pump pressure but it won't be much at all, couple of psi? High pressure diesel pump 1,500psi, slight difference"
common rail pumps run at up to 1600bar which is 14.5 times the psi pressure. 1600bar = 10.3 tons per square inch!

 

[Dr HMS Derv Destroyer]

I'd be happy to strip one of my old common rail pumps down that I ran for 4 years on2T diesel mix.

Bearing in mind that was a high mileage Dci aswell.

I've never had one diesel that's rejected 2T. As said 300ml to 50L of derv is a very small amount, BUT it does somewhat help lubricate and clean.

Wouldn't be so bad if diesel still contained high amounts of sulphur

 

[Landyman]

There’s no definitive answer. Reports conflict as to the benefits, if any.
However it seems that it won’t harm your engine if added in the small quantities recommended.
Many people have reported using it in the TD5, TDCi and TDi without any failures.

So the only thing to do is try it for yourself. If you think it makes your diesel engine quieter/use less fuel/run better then keep using it.
If you find no difference or it is worse, then stop using it.

You can’t even get a definitive answer on that, as some say their TD5/TDCi/TDi runs better/quieter/performs better etc while others claim no discernible difference.

 

[Robbie Corbett]

I also like to read that

2 strike oil is used in strimmers, bikes etc to stop a lot of piston wear. I don’t get how it would lead to high pressure pump failure? Plus even if that did happen I have about 6 spare anyway[emoji23]

Not agreeing or disagreeing either way however to be clear 2 stroke oil in strimmers etc isn't used to just stop piston wear - it is used to lubricate the engine, you cannot run them without 2 stoke oil premixed full stop.

 

[Robbie Corbett]

Sounds like total rubbish, the fuel pump(s) and motion of the fuel being sloshed around when the vehicle is moving will have mixed the two pretty well.
If the two have different density/weights they might separate (in theory) over time, but it might need to sit for like a year?

Add one fluid to the other, give it a shake and you won't end up with 'pools' of the stuff.

*** goes to kitchen to mix water and olive oil ***

 

[R3k1355]

*** goes to kitchen to mix water and olive oil ***

You've made an emulsion

#ScienceNerd

 

[Robbie Corbett]

You've made an emulsion

#ScienceNerd

Haha - true enough. I would be surprised if Diesel and oil did not mix relatively well though.

 

[GrahamS]

Just found this thread when I was searching for my own previous post about the ratio to use. I used two stroke in my dci for 50k flat out on the motorway for nearly all that mileage. The fuel system finally gave up at 156k which is far far longer than anything other dci I’ve ever owned. The one we have no has a terribleness system at 106k. I didn’t noticed any of the benefits people talk about but vpower and equivalent fuels are known to have additional lubrication in and that’s what this adds. Just about to start adding it to the turd to try and make it last longer!

 

[Krarl]

I have a spare old Redex bottle (250ml) that I fill and I bang this in every full tank. The biggest difference I noticed was the reduce in smoke and the noise was a little less

Although my dCi sounds like someone lobbing round a bucket of spanners anyway[emoji849][emoji23]

 

[dann2707]

Where did you get that big bottle from op?