Skim through the forum thread below. One of the forum members has been sharing details about their prop test results. In one of their posts they talk about the enertia eco. They were not impressed. At least in their testing, they were not seeing any real fuel efficiency savings, and they also saw a slight loss of speed on top end. However, each boat is a bit different, so it might work really well with your setup. I’d still lean 16-17p normal enertia.Thanks for the advice. I see the Enertia Eco, is that something I should look at?