I have the Saito 125 installed in a Seagull ultimate and have put about a gallon through it so far with only one flight in the air. At 1/2 throttle I am getting 7 1/2 min run time at 1/2 throttle 11 1/2 min run time. this is with a APC 16/6 prop. the engine was broke in by the book . I even exceeded it by doing 2 tanks at 400 rpm. The tank seems to be close to 12 oz .It does not state in the manual the size. I am going by looks alone on the tank size. Is this normal with this size motor?