Thanks Roelf and Tony (and Kurt for the hint re lawnmower) for the insight supplied.
After reading all, I have reached the conclusion that there is no credible evidence to suggest that additives are necessaryto increase lubricity.
The only real life evidence we have, is that modern Diesel engined cars are quite plentiful in SA (I have no figures but see quite a lot on the roads) and there are no reports / incidents (Newspapers, Car magazines, etc etc) suggesting failures of Diesel engines due to problems with or absence of sufficient lubricity. I think that more diesel engines are "killed" by head-on collisions than from any other cause !!!
So, I will use 2SO only for my lawnmower should I decide one day to change over from EISHKOM to fossil fuel, due to escalating EISHKOM prices....
Thanks again guys for illuminating (pardon the pun) the Diesel lubricity situation.
Two Stroke Oil In the Diesel
-
OBELIX123
- Country: South Africa
- Vehicle: Pajero Sport 3.2 DI-D GLS 2011
- Location: Randburg
- Tony M
- Country: South Africa
- Vehicle: 2008 Pajero GLS LWB
- Location: Cape Town
Post
Re: Two Stroke Oil In the Diesel
Hi Obelix,
Pleasure. Glad to be of help.
My first job after varsity was running a laboratory for well known companies that undertook both final QA and evaluation on lube oils, fuels, greases etc as well as doing analysis on oils and fuels from maritime shipping tanks.
A long time ago ... However I still remember the essentials and the comprehensive testing that went into each product (especially aviation fuels).
The additives that were put into these systems were very comprehensive and based on a phenomenal amount of R&D in Europe - and we certainly advised against anyone adding 3rd party 'additives' to our products because they may well have had adverse effects on the additives already added.
Often people thought that some of the products we produced were 'deficient' because they never understood the principles behind the formulation.
One was a case of a well known engine oil that was deemed 'problematic' because, on draining, there was often a 'sludge' found in the oil residue when draining. The reality was that this particular oil had an additive that would absorb moisture from the engine oil and deposit it at the bottom of the sump - hence removing any water from the lubricant. In other words it was working 'as designed' - just that 'Joe Citizen' didn't understand this and thought it was a defect.
Cheers
Pleasure. Glad to be of help.
My first job after varsity was running a laboratory for well known companies that undertook both final QA and evaluation on lube oils, fuels, greases etc as well as doing analysis on oils and fuels from maritime shipping tanks.
A long time ago ... However I still remember the essentials and the comprehensive testing that went into each product (especially aviation fuels).
The additives that were put into these systems were very comprehensive and based on a phenomenal amount of R&D in Europe - and we certainly advised against anyone adding 3rd party 'additives' to our products because they may well have had adverse effects on the additives already added.
Often people thought that some of the products we produced were 'deficient' because they never understood the principles behind the formulation.
One was a case of a well known engine oil that was deemed 'problematic' because, on draining, there was often a 'sludge' found in the oil residue when draining. The reality was that this particular oil had an additive that would absorb moisture from the engine oil and deposit it at the bottom of the sump - hence removing any water from the lubricant. In other words it was working 'as designed' - just that 'Joe Citizen' didn't understand this and thought it was a defect.
Cheers
- Tony M
- Country: South Africa
- Vehicle: 2008 Pajero GLS LWB
- Location: Cape Town
Post
Re: Two Stroke Oil In the Diesel
Since the original posts I gave up on using additives as none seemed to work.
As of December my 3.2l was sounding rougher than it has ever been so decided to take a look at additives once more.
As many swear by 2-stroke oil I went through safety data sheets to see which one would be the most similar but without any metal additives in it.
I had noted "Rislone Fuel Injector Cleaner" once before, having a similar oil base (based on boiling point) to that used in 2-stroke oil but I couldn't seem to find it in stock back then.
Not sure if it's been 'recently added' to the SA market but I managed to find on Takealot and also found it at Builders (although not on their website) at around R150.00.
Added a bottle (177ml) to 1/2 tanks and drove it to the local (1 Km or so) garage and filled up.
Could not believe the difference on the dive to the petrol station and back home again. Engine was much, much quieter with significant lowering of the 'hammering' noise.
Next day I drove about 25 Km and the engine was back to being noisy, not as noisy as before, but certainly not as quiet.
On the 25Km drive back home, the noise had gone again. And has stayed away thus far.
I drive the Paj very little so have only filled up once since December (and added another bottle of Rislone at that time).
My wife filled up last week and didn't add Rislone and there is somewhat more noise again, but still no worse than it originally was.
From memory Rislone say to add every second tank, so, in a way, this was a 'test'.
Next tank I'll add Rislone again and see what happens. Might try their expensive "Complete fuel system cleaner" next time around to see if the effect lasts longer (but it's ± R500.00 a go)
As I use the PAj so little these days, I can't really comment on the fuel economy as I don't fill up the tank but fill to 'first click' - therefore the accuracy of the amount of fuel consumed will probably vary from diesel pump to pump.
Early days yet but with a sample size of 1, there's no statistical merit.
However, I'm beginning to think that there's not enough additional lubricant in the 50ppm diesel to suffice the older diesel engines (mines 2008) that could run on 500ppm sulphur content.
Time will tell.
Just to mention I have zero affiliation with any oil company or additive manufacturer - well since 1978 that is (I was a QC chemist in an oil lab back in those days)
Hope this might help some Paj owners
Best,
Tony
As of December my 3.2l was sounding rougher than it has ever been so decided to take a look at additives once more.
As many swear by 2-stroke oil I went through safety data sheets to see which one would be the most similar but without any metal additives in it.
I had noted "Rislone Fuel Injector Cleaner" once before, having a similar oil base (based on boiling point) to that used in 2-stroke oil but I couldn't seem to find it in stock back then.
Not sure if it's been 'recently added' to the SA market but I managed to find on Takealot and also found it at Builders (although not on their website) at around R150.00.
Added a bottle (177ml) to 1/2 tanks and drove it to the local (1 Km or so) garage and filled up.
Could not believe the difference on the dive to the petrol station and back home again. Engine was much, much quieter with significant lowering of the 'hammering' noise.
Next day I drove about 25 Km and the engine was back to being noisy, not as noisy as before, but certainly not as quiet.
On the 25Km drive back home, the noise had gone again. And has stayed away thus far.
I drive the Paj very little so have only filled up once since December (and added another bottle of Rislone at that time).
My wife filled up last week and didn't add Rislone and there is somewhat more noise again, but still no worse than it originally was.
From memory Rislone say to add every second tank, so, in a way, this was a 'test'.
Next tank I'll add Rislone again and see what happens. Might try their expensive "Complete fuel system cleaner" next time around to see if the effect lasts longer (but it's ± R500.00 a go)
As I use the PAj so little these days, I can't really comment on the fuel economy as I don't fill up the tank but fill to 'first click' - therefore the accuracy of the amount of fuel consumed will probably vary from diesel pump to pump.
Early days yet but with a sample size of 1, there's no statistical merit.
However, I'm beginning to think that there's not enough additional lubricant in the 50ppm diesel to suffice the older diesel engines (mines 2008) that could run on 500ppm sulphur content.
Time will tell.
Just to mention I have zero affiliation with any oil company or additive manufacturer - well since 1978 that is (I was a QC chemist in an oil lab back in those days)
Hope this might help some Paj owners
Best,
Tony