Any of them Diesels, and if so have you had any problems with the fuel injectors. On my Mazda 3, 2 injectors have gone within 9 months of each other.
Mine’s petrol. Are you using the cheapest diesel every time? (Not that any is cheap atm). Maybe treat it to some higher quality stuff from Shell every so often.
Try this a couple of times a year and don't fill up at supermarkets...https://www.halfords.com/motoring/e...millers-diesel-power-ecomax-500ml-811125.html
