Losi recommends 5,7,2 for oil. The 8ight seems to be a very durable buggy. Most everyone at my local track runs an 8ight b or t and they hardly break anything. A buddy of mine got the RTR and hasn't had any problems. Keep in mind, if you want to use a bump box your going to have to get a sportwerks 21 backplate and normal engine mounts.

I actually just got my Race Roller in the mail today and I can't wait to get it on the track this week!