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Two stroke oil
Posted: Tue May 04, 2010 12:12 pm
by RoelfleRoux
Please, before you tell me to search because this has been discussed at length, just a quick question and hopefully a quick answer. This was a huge discussion on the 4x4 Community and I read every post and have taken it all to heart.
I'm off to the Richterveld on Thursday morning. The drive there from Barberton is arguably the longest distance possible across the RSA. Do you clever guys think that a few tanks of petrol with 2-stroke in, on the way there, will be more beneficial to my engine than harmfull to my cat converter.
The car in question is a 2006 3.8V6 MIVEC SWB with 50k on the clock. It runs perfectly, so I do not need to experiment.
Regards
Roelf
Re: Two stroke oil
Posted: Tue May 04, 2010 2:31 pm
by 4ePajero
I know ... it breaks down the carbon in the combustion chamber, on the valves and in the exhaust port.
I don't know .... what it does to a cat.
(Why not search?

)
Re: Two stroke oil
Posted: Tue May 04, 2010 3:00 pm
by RoelfleRoux
So,
I think I will do three tanks of 2-stroke and then, if in two year's time, the cat goes south, we will know why!
Thanks
Re: Two stroke oil
Posted: Tue May 04, 2010 4:00 pm
by 4ePikanini
luckily cats aren't compulsory in RSA so if it goes you can have it replace with a straight pipe for about R250 and gain some ponies in the process.
I don't know what de-catting might do to your warranty though.........
Re: Two stroke oil
Posted: Tue May 04, 2010 4:35 pm
by KaiV
M2CW on this "Boere theory" that the Boere used on their old Trekkers and Toyota 2.4D bakkies, is that it is totally unfounded. If there were much truth in this, then the diesel suppliers would add the oil already.
Now I sit back with my bullet proof on

Re: Two stroke oil
Posted: Tue May 04, 2010 4:55 pm
by SimonB
4ePikanini wrote:luckily cats aren't compulsory in RSA so if it goes you can have it replace with a straight pipe for about R250 and gain some ponies in the process.
I don't know what de-catting might do to your warranty though.........
It's not that simple anymore...
There are sensors on either side of the cat which the ECU uses to monitor and adjust fuelling parameters. Taking the cat out buggers this up.
Re: Two stroke oil
Posted: Tue May 04, 2010 4:58 pm
by MR2-Blue
KaiV wrote:M2CW on this "Boere theory" that the Boere used on their old Trekkers and Toyota 2.4D bakkies, is that it is totally unfounded. If there were much truth in this, then the diesel suppliers would add the oil already.
...or the car manufacturers would recommend it as well...I personally believe, the 2-stroke oil theory is a nice fairytale to increase turnover on the 2-stroke oil since there is almost no 2-stroke engines left in the market

,... in fact I heard about first time here in RSA...and never before in Europe.
Re: Two stroke oil
Posted: Tue May 04, 2010 5:13 pm
by SimonB
MR2-Blue wrote:increase turnover on the 2-stroke oil since there is almost no 2-stroke engines left in the market

,... in fact I heard about first time here in RSA...and never before in Europe.
You've obviously never ridden motorcycles, scooters, driven boats or mowed your own lawn!
Two stroke is as pervasive in Europe as it is here.
In fact, your beloved Germany has one motorcycle manufacturer that only builds two stroke motorcycles
Re: Two stroke oil
Posted: Tue May 04, 2010 6:12 pm
by 4ePikanini
SimonB wrote:4ePikanini wrote:luckily cats aren't compulsory in RSA so if it goes you can have it replace with a straight pipe for about R250 and gain some ponies in the process.
I don't know what de-catting might do to your warranty though.........
It's not that simple anymore...
There are sensors on either side of the cat which the ECU uses to monitor and adjust fuelling parameters. Taking the cat out buggers this up.
I have heard that it can be remedied by programming the ecu to ignore that sensor or to use an inline resistor of some sorts.
I'm sure a professional tuner can advise better.
Re: Two stroke oil
Posted: Tue May 04, 2010 7:16 pm
by MR2-Blue
SimonB wrote:
You've obviously never ridden motorcycles, scooters, driven boats or mowed your own lawn!
Two stroke is as pervasive in Europe as it is here.
In fact, your beloved Germany has one motorcycle manufacturer that only builds two stroke motorcycles
True - I did ride 2 stroke bikes when I was young, probably before you were allowed to do so

...to express myself more clear:
I never heard about the 2-stroke mixing fairytale for car engines before I came to RSA....
Btw. if you refer to MZ, the motorbike manufacturar in Eastern Germany - they now use modern 4-stroke engines for the little portfolio...and they are no longer a real competition in the market. Hercules, the scooter manufacturer doesn't exist anymore...