Conserving diesel by sailing slowly with 15 knots of wind rather than motoring

With the engine off and roughly 15 knots of breeze, Lauren Landers Sailing accepts a slow passage rather than burning fuel. She is actively trying to conserve diesel and is comfortable making around 5 knots under sail to do it. This is a practical cruising trade-off she makes openly: slower progress in exchange for keeping the fuel tanks fuller for when the wind disappears entirely.