So you don't get the performance from the octane, it comes from the engine, which now requires a harder to ignite fuel. Example: My GTI requires 91. If I use 87, it senses ignition and retards the timing, and that's what makes it slower.
On average females can have 3-4 servings of carbs for each meal, and a serving of carbs in between meals. A serving of carbohydrates is 15 grams of carbs. On average, a male can have 5-6 servings of carbs for each meal and a serving of carb in between each meal. Remember, though, that the type of carb matters to. As a diabetic, you should choose carbs that are whole grains.
For example: Each gram of carbohydrate provides 4 calories. A person with diabetes on a 1,600 calorie diet should get 50% of these calories from carbohydrates. This would be a total of 800 calories of carbohydrates (at 4 calories per gram) spread out over the day.