I think the two main takes are: 1. a tiny bit of horsepower/fuel efficiency and no maintenance -- win 2. It might work by increasing the size of things allowe

I think the two main takes are: 1. a tiny bit of horsepower/fuel efficiency and no maintenance -- win 2. It might work by increasing the size of things allowed through, which maybe matters to your engine life? -- loss. YMMV, literally