Traded in my GT JTDM 4 months ago for a 2.0jtdm 159 lusso sportwagon and have just had the rumbly regen experience, apparently my problem is the short runs I do, the car is not getting properly warmed up then its stopped again, 4miles to work,4miles back. I have recently started to add WYNNS DPF Cleaner and it's made a difference, apparently it reduces the temp. at which the soot turns to ash and burns off quicker so here's hoping that will give me better mpg too, it's around 40 at the moment average and that's not bad but I hoped for better as I got that with the GT with the 1.9 engine. Think ALFA and the government are having a laugh with the 52 mpg claim, I don't think that is possible in any conditions or with slippers on and crawling along. What mpg are others getting with these cars realistically ??
Love the car otherwise, only other gripe is road noise on some roads with 18" tyres.