i put premium in it, which is 91 where i live. and as for starting, it usually starts just fine, idles kinda low when its first started in the morning, but after a few minutes, its fine. i can't leave the choke on for more than thirty seconds cuz then it just dies, is that normal or is that another problem i need to address? once i find the solution, i'll post it, let you guys know what it was.