Like Ron mentioned, check out the first post.
Something I experienced and it may not apply to all is that my engine was easier to tune and runs better with the Byrons 3000 9% oil and a Werks #5 plug. You can break it in with the 11% oil, but after break in, if you are finding that it may be a little finicky, try 9% oil.
Like I said, may not apply to all, but just found 9% to run a little cleaner.
thanks i just read that a lot of good info. how is this motor with a 2058 pipe in a losi 8 t kit?