Fuel cost is less, Safer on the engine, and you gain power. It is a fantastic upgrade. It only eats your lines if you don't have rated lines. Hence i re did my entire fuel system to be E85 ready. my only issue with it at the moment is where i live (Canberra) there is only two places that sell it at the moment. But by the end of the year there will be a quite a few more. So im waiting for that rollout to finish.