As a member of the EU, the Czech Republic is bound by EU directives. These include
DIRECTIVE 2009/30/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL...
Originally Posted By: Directive 2009/30/EC
Diesel fuel
1. Member States shall ensure that diesel fuel may be placed on the market in their territory only if it complies with the specifications set out in Annex II.
Notwithstanding the requirements of Annex II, Member States may permit the placing on the market of diesel with a fatty acid methyl ester (FAME) content greater than 7 %.
Member States shall ensure the provision of appropriate information to consumers concerning the biofuel, in particular FAME, content of diesel fuel.
2. Member States shall ensure that, no later than from 1 January 2008, gas oils intended for use by non-road mobile machinery (including inland waterway vessels), agricultural and forestry tractors and recreational craft may be placed on the market within their territory only if the sulphur content of those gas oils does not exceed 1 000 mg/kg. From 1 January 2011, the maximum permissible sulphur content of those gas oils shall be 10 mg/kg. Member States shall ensure that liquid fuels other than those gas oils may be used in inland waterway vessels and recreational craft only if the sulphur content of those liquid fuels does not exceed the maximum permissible content of those gas oils.
However, in order to accommodate minor contamination in the supply chain, Member States may, from 1 January 2011, permit gas oil intended for use by non-road mobile machinery (including inland waterway vessels), agricultural and forestry tractors and recreational craft to contain up to 20 mg/kg of sulphur at the point of final distribution to end users. Member States may also permit the continued placing on the market until 31 December 2011 of gas oil containing up to 1 000 mg/kg sulphur for rail vehicles and agricultural and forestry tractors, provided that they can ensure that the proper functioning of emissions control systems will not be compromised.
3. Member States may, for the outermost regions, make specific provision for the introduction of diesel fuel and gas oils with a maximum sulphur content of 10 mg/kg. Member States making use of this provision shall inform the Commission accordingly.
4. For Member States with severe winter weather, the maximum distillation point of 65 % at 250 °C for diesel fuels and gas oils may be replaced by a maximum distillation point of 10 % (vol/vol) at 180 °C.
Originally Posted By: hajes
BTW - you're making too much drama around DPF. Imagine you live in Europe where most crude oil is from Russia - it is known it is high sulphur oil.
I do live in Europe, where fuel quality is controlled by the EU to be
Originally Posted By: hajes
In Czech Republic is worst fuel you can buy - TOO MUCH SULPHUR in diesel.
It really is NOT the worst fuel you can buy. Try Russia. Or China. Or India. Or even Turkey. Or countless other countries with mandated but uncontrolled fuel supplies.
And for the record, my source of information is 22 years of engine oil product development, technical support, analysis and training. In my world, an experiment is scientifically planned and implemented, with statistical analysis of multiple data points. Outstanding results sometimes have to be ignored because they are not statistically valid. Home experimenters often forget (or don't know) this and rely on a sample of one to substantiate universal statements.