just to share my experience so far with KHAOS...
so far, their claim on the gas savings is really effective. i really do save around 25% on my consumption upon installation.
8-9km/l without khaos to 10.21-13.27km/l with khaos.
i think the offer they had on the 'money back guarantee' is something we could look into. they also guarantee extended lifespan of the engine.
in my case, don't realy know much on tech side of the engine so i just based my car performance on the fuel consumption. i do consider this as good investment.
again, it is still your choice to try and not to try the product. thanks!