I ve come across a very good website that explained on fuel saving gagets. He s a fuel engineer and he explains everything in detail and scientifically. From what he says, most cars, burns fuel 98% efficiently and the remaining 2% would be gone through the process of transmitting the fuel, therefore it is an inevitable process. Unless your car is 20 yrs old where everything doesnt work wel anymore, all these doesnt work.
Myself also like all these fuel saving gadgets, but i dont think most of them works, or worth the effort. Furthermore, our fuel are optimised and processed well, therefore there is not much cleaning left to be done. V-power and Petronas fuel both already has cleaning addictives in the fuel. So if u really want to clean your engine, go for these.
Fuel Catalyst - Myth or Fact?, User Feedbacks Are Highly Appreciated