Exactly the same as I do, and I found the same results too.I have the same engine but have only used standard unleaded.
Have previously used higher octane fuel in past cars I have owned with more horsepower and saw no gains, all I saw was my price go up when filling up so I have stuck with standard fuel for a few years now.
I wouldn't spent the extra money on it unless the manufacturer recommends it from stock, just my opinion of course.