My brother this week put about £8 worth of unleaded in my diesel Saxo. He was advised at the gararge to fill up the tank to dilute the unleaded, whis was about £35. About a week of running i have had some problems with the running of the engine. It now smokes a lot and seems to misfire a little on the first
20 mins of a journey. Has anyone any advice on what might have happened or has a glow plug gone down?......