93 because 2.0 accord are high compression engine and you want to pump top tier gas reduce down knock control make ur car run better
No engine failures?you can feed your honda anything you want. it's your car, your money, and your choice. i trust the fact that honda recommends 87 octane or higher (as acceptable alternatives) and the fact that of the hundreds of thousands of honda turbos on the road, in various models and countries and no widespread engine failures as proof. my accord just crossed 150k and runs like a champ. all of those miles on 87. i'd be more concerned with carbon deposits due to direct injection before a catastophic failure because of knocking. seems like almost every time there's some sort of problem here on the forum and it always starts with "...stage X tune" or "here's a list of the mods i made...". maybe we should simply leave our cars stock and understand they're not race cars, never going to be, and deal with reality. i firmly believe anyone can do what they want with their property and will always defend one's right to do so. run 93 if you want, i'll stick with 87. btw: what bmw in your lifetime recommended 87 octane? as long as i can remember it was minimum of 91. same too of volvo. if your friend wasn't following the recommendations then he gets what he deserves.