I made a huge mistake and accidentally filled my petrol car with diesel. I've heard about wrong fuel services but I'm not sure what to expect. Has anyone used these services before? What steps do they take, and how effective are they wrongfuelsos.com? Also, are there any specific companies you would recommend or avoid? My car is currently parked, and I’m unsure if I should attempt to start it or not. Any advice or experiences you can share would be greatly appreciated. 

Thanks in advance for your help!