Oh, I see. Not sure if there are any bad brands out there, not that I've hear anyway. They're all pretty much good ones. Talk with the people at the hobby shop, they'll probably recommend something. As far as content either 10-15% nitro and 18-20% oil should work just fine. A buddy I fly with uses 15/18. I use 15/20. Some use 10%, 15% and even 20% nitro(competition guys/those who want max power). I just like the extra 2% oil. I figured it wouldn't hurt when it comes to keeping everything nice and lubed, cool as well.