So, I've had a diesel nearly three years, and after thirteen hours at work, I grabbed the green nozzle and stuck it in without a thought. Pretty much as soon as I squeezed the trigger, I realised I still had a derv and pulled out. So only 40p of unleaded and I'm not that worried about it after a seventy quid fill up of diesel. But I'm curious, how often does this happen, as I thought you'd need to be particularly careless to misfuel but here I am. I suppose twelve years of driving and only three in a diesel is some excuse... Perhaps it's all the fantasising over something faster and petrol.