i used brake fluid, it hits harder then VTEC fluid i used it with my d15b vtec hatch a while back..and the fuel thing, red bull, with a little salt mixed in actually does add about 5-7hp to the wheels. combined, they form some weird reaction and explode faster, kind of like nitrous but its in your gas. like vtec hits, then all of a sudden something else hits... :confused: its scary though i dont think you should do it on the street.