http://www.shell.com/home/content/au-en/sh...z_lhn3_3_2.html
Have a look down the bottom of the page. Should clear up a few things.
Just a question for those of you who did have or still have their cars tuned to V power Racing. (mine is at the moment, I havent driven it because i have blown my gearbox). What have you done as a tempory measure until you get it retuned? put 98 in it and take out some timing? Any other tricks?