I answered none. I only use the engine to get to and from the breakwater, otherwise I'm sailing. I would rather lope along at 2 knots than turn on the engine to get home faster, but I've always been that way. As for driving, I drive a TON for work as I am a real estate appraiser. I raised my fees $ 25 per appraisal.....no more problem. I think they call that trickle down economics.