well, i idled it for the first 1/2 of a tank, then drove it at 1/4-1/2 speed for 4 seconds on power, then at the end of the third tank i used that same method but with 3/4 throttle, then at the 4th tank i used full throttle but i was still gentle and it was still pretty rich. do you thing it will have a good lifespan with that method?