Hello Everyone! I regret for bad English, I'm from Russia. As I found, in this forum there are many professionals in lubricating oil technology. So I dare to describe my problem, hoping to find an answer. Here is the case: 90% of all gasoline passenger cars in Russia meet Euro-0 emission standards, and only 10% meet Euro-1 or Euro-2. With Heavy-Duty Diesel Vehicles situation is even worse. But recently our government has issued a law, that since October 1, 2003 it will be outlaw making and importing passenger cars, trucks and buses, not meeting Euro-2 norms. My question is, how this will change russian engine oil market? What is the relationship between emission limits and baseoil/formulated engine oil characteristics? Is there any documents, standards or something, which describe it? In ACEA Oil Sequences there is only one reference to Euro norms, particularly, categories E3 to E5 are recommended for diesel engines meeting Euro requirements. I've been searching the internet for few days, and found only one document, which describes impact of emission regulation on lubricants: http://www.ifqc.org/visitors/techbrief/2002nov/LubrizolParis.pdf But I want to know more. Maybe You can help me? Any information would be useful. And one more question: is there any specification for base oil quality or performance (besides API classification), particularly in Europe? Many base oil manufacturers label their products as 150SN, 650SN, 150BS etc. I know that SN means Solvent Neutral and BS -- BrightStock, and number is Saybolt viscosity. But is there any performance requirements? Thank You.