finally got to start breaking in my go 7 port this afternoon. I used some oil from massive mods. I think it is run in oil. you put in the engine first then turn over by hand a few times,then dry start on the starter box for about ten seconds,.after half a tank you add more oil to the nitro. by the time I got towards the end of the 1st tank the engine was purring nicely. I had foil around the head, engine stayed around 180-190 degree mark at idle after half a tank was gone. before that was around the 150ish mark. I do not know how much that oil from massive mods helped in the break in process or if I am just lucky. But my engine only locked in place once. after I got it unlocked and refired had no more lock up issues. no I cannot turn over by hand being the pinch is so tight but I did not burn out a starter box either. was so surprised that this oil maybe doing what it say's it would that I put some in my 5 port. since the 5 port has 1.5 gallons and is just really starting to break in I figured it wouldn't hurt to do the same thing to it. bigger then crap engine after idling 1/2 tank started to smooth out on the idle, didn't touch a thing. they say there is no magic fix in a can,but I think this proves them wrong. I would recommend everyone purchase this for the tool box.