2 stroke oil (2SO) as an additive to diesel fuel

**CardinalSin** · 09-01-2015, 10:29 AM

Originally Posted by twincab

Is there any evidence that 2so/diesel seperates out like normal 2so/petrol does when left standing for a few weeks.

thanks

There have been a few tests to see how well it mixes and it appears to bond with diesel, probably because they are so similar both being light oils engineered to combust. I would assume it mixes as well as Caltex and BP diesel do in the same tank.

I always give my chainsaw a good shake up before I start it because i've noticed how 2SO settles out in petrol over time.

**twincab** · 11-01-2015, 10:06 AM

Our everyday ride is a 125kw Skoda Superb, but one of our other vehicles is an 05 F350 7.3 which is used for towing duties. Quite often it sits for 2/3 weeks at a time and I was concerned that the 2stroke would seperate out over that time.

**CardinalSin** · 11-01-2015, 10:34 AM

Originally Posted by twincab

Our everyday ride is a 125kw Skoda Superb, but one of our other vehicles is an 05 F350 7.3 which is used for towing duties. Quite often it sits for 2/3 weeks at a time and I was concerned that the 2stroke would seperate out over that time.

I'm sure it wont seperate in diesel but if you're concerned why not mix some in a jar and leave it for a few weeks to see what happens?

Another point might be that in a diesel 2SO is a fuel, unlike when it's used in petrol engines, so the unlikely event of seperation over time would have less if any consequence?

**Transporter** · 11-01-2015, 10:40 AM

Originally Posted by twincab

Our everyday ride is a 125kw Skoda Superb, but one of our other vehicles is an 05 F350 7.3 which is used for towing duties. Quite often it sits for 2/3 weeks at a time and I was concerned that the 2stroke would seperate out over that time.

If your diesel engine seats for 2/3 weeks then you have to also think about the other tasks that proper diesel fuel additives do. Like fighting the bacteria, dispersing water from the fuel system making it safe to pass for the delicate surfaces in the modern diesel fuel systems and much more.

None of this is possible with the 2SO.

**twincab** · 16-01-2015, 08:23 AM

Thanks, yes I have been using the Chemtec diesel treatment and thought I'd investigate the 2 stroke option before buying the next bottle.
Think I'll give the Moreys a go this time.

**CardinalSin** · 16-01-2015, 12:16 PM

Originally Posted by twincab

Thanks, yes I have been using the Chemtec diesel treatment and thought I'd investigate the 2 stroke option before buying the next bottle.
Think I'll give the Morleys a go this time.

Dont be put off trying 2 stroke oil.
There's another thread dedicated to the other diesel fuel additives and what they might achieve.

**Preen59** · 16-01-2015, 02:18 PM

Originally Posted by CardinalSin

I'm sure it wont seperate in diesel but if you're concerned why not mix some in a jar and leave it for a few weeks to see what happens?

Another point might be that in a diesel 2SO is a fuel, unlike when it's used in petrol engines, so the unlikely event of seperation over time would have less if any consequence?

As far as I am aware, 2 stroke oil forms an emulsion when mixed with diesel.

**kaanage** · 20-01-2015, 06:09 AM

A vegetable based one (ie castor oil) will and maybe some synthetics might but a mineral based 2 stroke oil will fully mix with diesel. I add it to jerry cans and there is no sign of separation after a couple of weeks (they're yellow plastic ones so there's plenty of light when you look in the opening.

Originally Posted by Transporter

If your diesel engine seats for 2/3 weeks then you have to also think about the other tasks that proper diesel fuel additives do. Like fighting the bacteria, dispersing water from the fuel system making it safe to pass for the delicate surfaces in the modern diesel fuel systems and much more.

None of this is possible with the 2SO.

Really? Can you show me the tests where 2 stroke oil has failed in either of these tasks?
Not that I think it would disperse water (which will lessen the lubricating effect in the fuel pump and injectors so the additive had better increase lubricity to offset this) but it could help with the bacteria (would probably be dependant on the exact oil used) although a test would be needed either way.
Gldgti asked for factual proven statements only - I would have no issue if you had worded your last statement as

None of this is has been proven with the 2SO

**Transporter** · 22-01-2015, 11:26 AM

Originally Posted by kaanage

Really? Can you show me the tests where 2 stroke oil has failed in either of these tasks?
Not that I think it would disperse water (which will lessen the lubricating effect in the fuel pump and injectors so the additive had better increase lubricity to offset this) but it could help with the bacteria (would probably be dependant on the exact oil used) although a test would be needed either way.
Gldgti asked for factual proven statements only

Now, you're confusing me, "the factual proven statement"? Proven by who?

**kaanage** · 29-01-2015, 12:35 PM

As a personal, first hand observation, our 103kW CR MkVI Golf used to produce a light soot layer in the tail pipes (I'd wipe them down every now and then while cleaning the car).

Since adding the TCW-3 2 stroke oil at 200:1 during fillups to this car a couple of months ago, the insides of the tail pipes have remained clean. For what it's worth....

Originally Posted by Transporter

Now, you're confusing me, "the factual proven statement"? Proven by who?

Proven at the least by your own personal observations. Since you never run 2 stroke oil, you can't say definitively what it can and can't do.