My mother bought a cr-v after talking her into it. I think it the LX. But anyway I noticed in the Handbook it does not tell you when to change oil but you should change it when the oil life gets low in the car. Also can i change the spark plugs? Or will i have to have the dealer change them when it gets to that point, because i couldnt even find the spark plugs. When do the SPark plugs need to be changed on top of oil changes? What about fuel filter? And does the tires really need to be filled back up with Hydrogen?