Just wondering what RON petrol you all run your DC5's on. I saw on the spec page that it is supposed to be 100RON. I havn't got my car yet but when I do I'm not sure what to do. Petrol in Ireland is 95RON, 97 is few and far between and costs up to 35c a litre more. I have been looking into buying millers octane plus but I would need 2 bottles per tank. Each bottle incresaes 50 Liters by 2RON.