I just had to post my thoughts on the latest Novarossi I bought. I broke in my new Roma yesterday and it went great. I used the recomended 14% oil 6% nitro mix and ran it at around 15,000 rpm for an hour. I heated it up to around 170 f and primed it . When I fired it I didn't have to touch the needles and I set the thottle to what seemed about 1/4 and it ran around 200 degrees the whole time. This had to be the easiest breakin I have ever done.Great job to Novarossi on your engines!