Car/conditions:
2001 Honda Prelude 5-speed, 2.2L VTEC engine, 3% fuel lean using air/fuel controller, paper air filter. 9,000KM interval, 49,000KM on engine, daily driven in winter in Toronto, cold starts, occasional 7,400RPM shifts, 2 x 30KM of highway driving every day, 40% city, 60% highway...