@aspeck, after reworking your answer, which I was getting as well, you have not made a 50:1 ration of gas to oil. You now have a 49:1 ration of gas to oil. If you take your 15.36 number (768/50) and multiple it time 49, you will get 752.64 and then add in the 15.36 for the oil, equals 768 which...