I've been researching the topic of how much sulfur is allowed in petrol in Switzerland and I can't seem to find a clear answer for this question.
In EU it is crystal clear: http://transportpolicy.net/index.php...l_and_Gasoline
. Euro 5 allows maximum 10 ppm of sulfur and this is being like this since 2009.
If I search on Swiss web-sites I can see that Switzerland has it's own standard on fuels which is called "SN EN 228": (in French) http://www.petrostock.ch/normes.html
If I search for "SN EN 228" I can see that there are different interpretations of the sulfur quantities. For example:
1. 50 ppm specified at http://www.moser-brennstoffe.ch/page...ontent&menu=34
(in German, use keyword Schwefelgehalt)
2. 150 ppm specified at http://www.vollan.ch/de/pdf/bleifrei_98.pdf
for Shell Superplus 98 (in German, use keyword Schwefelgehalt).
If I search for the official federal documents regarding the allowed of amounts of sulfur I can see an article which mentions that Switzerland is taxing fuels which have big amounts of sulfur: (in French, but switchable to German) http://www.admin.ch/opc/fr/classifie...179/index.html but it does not say that it bans the fuel
. The reason
I am searching for this is very simple. Modern cars require fuel with low amount of sulfur so that their catalytic converters will function properly. Too much of sulfur may damage catalytic converter and result in a costly reparations. This mostly relates to cars with DPF.
There is also a group of engine oils called "low SAPS" oils: https://www.oelcheck.de/en/knowledge...ring-2010.html
which are very demanding to the quality of fuel and to the amount of sulfur. There are some studies which say that 150 ppm to 300 ppm of sulfur may cause low SAPS oils to make sludge and this will influence engine wear protection.
Since most of the diesel cars require low SAPS oils these days I was wondering what are the limits of sulfur here ...