Premium E5 or Regular E10 fuel ?
hey guys, so quick question, hopefully someone can finally clarify this for me. I live in Europe and we have different octane measurements at the pump. So far i've been using what here is 95 (RON) and i think that would be the equivalent of 91 in US.
now the thing is, the 100 (RON) octane premium which is about 95 US i think has E5 gasoline while the regular has E10 gasoline. So which one should i use ? Is it ok to use the 100 (95) one with E5 or should i just stick to regular 95 (91) with E10 ?
now i know the manual recommends 87 (US) which we don't even have here so just wondering if putting in premium would be an issue as i would like as low ethanol as possible.
PS : the car is a 2005 mustang v6.