two stroke oil in the diesel ?

[pikeybob]

Cheers darkblue worth asking

[FATBOYFIN]

2 stroke is oil, diesel is oil how can it knacker the cat

[winterheating]

2 stroke is oil, diesel is oil how can it knacker the cat

just the same as incorrect engine oil can f*uck up partical filters on some fiats.

[FATBOYFIN]

read the tread what APSDS started tonight by the way I thought you said knacker cat now its paticulate filter like I said read what all replys to APSDS thread then u might understand what is being talked about here

[winterheating]

diesels dont have catalytic converters the have particle filters.

dont know why, but some new diesel FIATS have to have correct engine oil, as its been known to wreck the particle filters, this must just from oil vapour travelling through engine breather to intake combusted then to exhaust.

so, same could apply with mk7s, the particle filter could be damaged cos of use of a 2 stroke oil mixed in fuel.

[FATBOYFIN]

in that case use low ash 2t oil its just the same as using low ash engine oil yes no

[FATBOYFIN]

I forgot to add I have been using 2t in a twin turbo 3.5 litre diesel BMW for the last 4 years without any problems the cars 4 years old

[winterheating]

Selection Criteria For Diesel Particulate Trap Systems: VERT Experience
Andreas Mayer
TTM
VERT Project Manager

Introduction
Hot gas filters for diesel particulates have been the focus of intense activity during the last 20 years. Numerous filter media and regeneration methods were developed. Only a few of these reached maturity and were tested. Even the mature systems were not widely deployed because there was no legislation and the engine industry did not voluntarily implement this promising development.

Meanwhile a new situation has evolved. Legislation is now effective in Germany (TRGS 554 and the German TA Luft), Austria (Occupational Health) and Switzerland (the new clean air act LRV 98).

Accordingly, VERT [1, 2, 3] initiated comprehensive investigations (1993 - 1998). These confirmed the particulate trap as the only efficient solution for sustained curtailment of the diesel soot. The investigations particularly proved that such filters can intercept at least 99% of the sub-micron particulates in the range of heightened pulmonary intrusion. Thus, the imperative to minimize carcinogenic substances in occupational health, and ensure air quality, are better fulfilled than with all other known measures. These results have been repeatedly published and discussed among specialists. The facts are now established.

Particulate filters are now imperative for many applications. They are a prerequisite for implementation of the VERT conclusions in occupational health (Suva, AUVA, TBG) and compliance with the Swiss clean air act 1998. The deployment of these traps is proved to be technically, operationally and economically feasible. The traps are state of the technology. The technology, in particular the availability of proven traps systems, was thoroughly investigated in the VERT project in collaboration with several industrial partners. Compliance with the resulting VERT specification must be individually ascertained through the VERT suitability test.

This report summarizes trap selection criteria developed by the VERT program and lists all trap systems and control techniques that gave positive results in field tests. The list includes the traps investigated during the VERT project and completed the VERT suitability tests. This report does not cover the many filter media and regeneration systems that are yet undergoing development or are being researched.

A working group "particulate trap systems" was formed on 30 September 1998 by trap manufacturers, additive suppliers and suppliers of control systems. Its task is to technically accompany the wide scale deployment of particulate trap systems. "Instructions for using particulate traps" are being prepared for this purpose. The working group will evaluate experience and periodically inform both users and the authorities. The working group has its contact address at TTM (TTM, Fohrhoelzlistr. 14b, 5443 Niederrohrdorf, AG, Switzerland, Tel.: +41.56.496.6414, Fax: +41.56.496.6415).

Objectives and criteria
Since, according to the law, the carcinogenic potential must be restricted to the technically possible minimum, the primary target is to minimize the pollutant emissions from diesel engines. The carcinogens are mainly the particulate combustion aerosols, the so-called diesel soot. These particulates have a solid core mainly consisting of elementary carbon. They also have a very surface-rich morphology. This adsorbs many other toxic substances, that are transported with the particulates, and can penetrate deep into the lungs. Besides these combustion aerosols, the exhaust gas also contains further solid aerosols, e.g. ash particulates, metallic abrasion, sulfates and silicates. The vast majority of these particulates are in the invisible sub-micron range of 100nm. Trap systems must therefore efficiently diminish the particulate count as well as the particulate mass.

Trap systems for this duty must have a very high filtration rate in the entire range of pulmonary intruding particulate sizes. Modern systems can attain values above 99%. The value of these trap systems is enhanced when they also eliminate further pollutants, in particular the carcinogenic PAH, through the binding on the particulate surface. The deployment of filtering exhaust gas treatment systems must not generate any additional pollutants (secondary emissions). This is not a forgone conclusion, as experience with metallic fuel additives has shown.

Trap operation is characterized through long periods of soot collection alternating with short burn-off sequences. These should not result in emission peaks, i.e. caused by rapid regeneration with phases of incomplete combustion or trap rupture tendencies. An additional criterion is that these traps only cause a negligible back-pressure. Otherwise the engine process is impacted and, in turn, increases fuel consumption, increases pollutant emissions or shortens durability. There are many other practical criteria, e.g. trap size, weight, thermal inertia, muffling, surface temperature. Of course, the investment and operating costs as well as the maintenance effort are decisive criteria in the success of such exhaust gas after-treatment technology.

[winterheating]

i think theres a bit more to it than just using low ash oil.

i know how to get round it thought just remove the filter.

http://www.helmholtz-berlin.de/media/me ... ke2009.pdf

[FATBOYFIN]

did you copy that text or is it your own work

[winterheating]

ive just spent 20 minutes thinking and typing

[winterheating]

look at the link aswell

[FATBOYFIN]

I did look at the link I understand it do you

[FATBOYFIN]

I have to go to work soon so for now Good Nite SON

[winterheating]