[Tannaton]

Morning....

The notion that it is supermarket fuel is unfounded. There are six refineries that produce petrol in the UK and none of them are owned by Supermarkets..... it's the same stuff more or less that you get from a branded forecourt.

First thing is to get is plugged in to some diagnostic equipment that understands Volvo - i.e. preferably Volvo VIDA at a dealer or Indie. There are a number of faults that can put the 185 D5 into a not well documented "restricted power" mode (rather than limp mode) and this doesn't put any lights or messages on the dashboard.

The scenarios I have personally experienced are intermittent or complete failures of the DPF and Catalyst temperature sensors. In this mode the revs are limited to around 3k rpm, but under that it will drive okay so it's possible not to notice - even on an auto - if you are just pottering about.