ok so i have a question, i was thinking about drainging out this tank of gas, and moving up, sticking the $$$ gas in it, with octane boosters, i drive a 2000 avenger, does it really make that big of a difference, or is it just noticebale in older cars?

You probably won't notice much if any difference except in your wallet from the cash you wasted by getting worse gas mileage.