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Message: <blockquote data-quote="patgwh" data-source="post: 653078" data-attributes="member: 28142">I think supersonic have a point. The diesel based on euro standards are looking at emission and pollutants coming from the exhaust into the environment. So far the euro standard didn't mention anything on performance. But looking at other forums on this subject reveals that the engine made for euro 4 have higher temperature requiring special types of engine oil to lubricate the internals. Apart from changes in the engine, the exhaust system have the most changes i.e. catcon, dpf, SCR, electronic EGR, etc. All of these changes working towards meeting the stringent emission standards of euro 4.Of course, the interesting question here would be what happens when euro 4 is introduced? Will this fuel be compatible with existing euro 2m engines? And what are the repercussions be? I guess this applies to petrol too, no? :39:</blockquote>