It is common belief among Honda mechanics that Bosch platnium plugs don't work well in Hondas.
Personally I like NGK or Nippon Denso (now called Denso) spark plugs, they have a platinum spark plug that is very good.
One important thing on your engine. It is important to have the valves adjusted as the engines around your year had a tendency to "burn valves" if not adjusted as part of a regular tune up.
...tment has changed their maintenance schedule for the 2009 CRV and it does not specify when the spark plugs need to be changed. The previous schedule noted that they were to be changed at 90K. The new s...