Moreover the math doesn't add up.
To lose a pound of fat, you need to burn 3,500 calories. This has to be done BELOW your basal rate, which is the amount that is consumed daily through normal body activities.
At the rate 8 minutes for one mile you are burning 795 calories PER HOUR (at say 150 lbs.), or 13.25 calories per minute. If you run for 8 minutes, you are burning a total of 106 calories. If you do this every other day than in a month you will burn 1,590 calories per month, which will equal less than 1/2 lbs. per month in weight loss provided you don't have any cheat meals. In three months, you would have lost 1.5 lbs. You simply aren't doing enough.
To lose 15 lbs. in three months you are losing 5 lbs. a month, which is easily achievable, but not running a mile every other day. To reach your goal you'd have to lose 1.25 lbs. per week, or 4375 calories a week. If you're doing it every other day than you're doing it 3 or 4 times per week, so let's say 3.5. In order to lose that much you'd have to burn 1,250 calories per jogging session or run for an hour at the rate of a mile every 5.5 minutes.
Your math to me doesn't add up.