Premium fuel

[Saff]

Hi, I've never been a user of the higher-priced premium fuel but am now a convert. I'll shorten a long story. Mrs Saff's MB B-class had issues with diesel knock and smoking exhaust. I always used Costco diesel for this and my own D4. Anyhow, a reputable engine guy, on hearing this knock suggested I try the pricier stuff. I was a bit sceptical but went ahead. The engine is quieter, more responsive and just nicer to drive. I'm not sure about fuel economy yet but I don't really care as the improvement is so incredible. I have now switched to this for my 4.2 tdi and whilst not as dramatic the engine seems quieter and throttle response definitely has improved. It's BP Advanced btw.
Just thought I'd share.
Steve.