Quotation: Original written by Eifelbacher Quotation: Original written by Harry-NRW The machine runs quieter with 2T oil, but the larger part of the quieter run has the fuelled diesel quality. Diesel from discounters and also brand fuel from some chains runs rougher than that of the yellow/red shell tanks. I tested this several times. Since the diesel comes mostly from the same refinery (Vienna – Schwechat) at the gas stations I frequented are only the Additives of the individual fuel companies are decisive. The two injectors on the attached picture have driven the last exchanged No.1 – 42,000 km with 2T oil and No. 2 – 5,000 km with 2T oil. I find here the cleansing effect already visible. LG robert PS: At the same time the 2T oil additives have removed the flaps and the AGR is shut down.