My mom has a 2011 Honda Fit Sport with about 22,000 miles on it. She wants to maintain it by the books. The owners manual on her 2005 Civic had a maintenance schedule in the back of it, the Fit owner's manual does not. I found answers for everything else on google, but I have a couple questions. What kind of spark plugs should I use for this car and at what interval should they be changed? I know the Civic uses Iridium plugs or something similar that are changed every 100k. Also, when would the timing belt be changed on this car? I saw one source that mentioned 60k for a timing belt change. I thought the interval was closer to 90k? Thanks!