Correct me if I am wrong. If Littlefire is talking about euro2 that should referred to diesel engine and not petrol engine for Proton P3. I agree that out diesel fuel is of low quality but our petrol is good with ron95 and ron97 (if not mistaken europe use ron97/98) and they are unleaded fuel.

Sorry..I dont get the point here. Are we talking about Diesel or Petrol. Euro 2 is for diesel only. It does not apply to petrol..correct??

If V12Kompressor is talking about Hyundai GDI then (if not mistaken) it is diesel engine not petrol engine.

Our unleaded petrol is of International standard and I dont think there is sulphur in it.

So .. from what I understand so far it is not about the fuel being dirty so much but the fuel resistant to 'knocking' during compression (ignite before it is supposed to).

So our Proton engine must comply with the country's fuel mixture..cos different country has different fuel mixture and sea level has to be taken into account too..Actually it is a little confusing if you want to talk about fuel octane..

It is simply about resistance to knocking..the higher the octane the more compression the fuel can withstand.

Yes.. RON(Research Octane Number) is fuel octane measurement grade.

Euro2/3/4..so on, is the emission standard measurement/requirement by the country.