certainly.shell optimax is a new unleaed fuel in australia produced by shell.it has certain cleaning agents in it which help clean injectors and cylinders from carbon build up.alot of peopole have tried this new fuel and the reports are all good with mosy sayiny an improvement in power and economy.i am not sure how long untill it is available in other countrys or if it even will be as it was manufactured for australia.it is about 10 cents per litre more than normal unleaded,but the savings in fuel economy and performance make up for it. we are paying between 90cents upto $1 per litre for optimax at the moment and 85--95 cents per litre for normal unleaded.i will try to get some more tech info for you over the next few days