I bought my car ('95 Integra LS) just after the seller had the 60k service. It's a bit more than 60k later, and I never took it for it's 90k or 120k service. I've been good with the preventative maintenance, so are the 30k services necessary? I know they're a bit pricey, and my wife and I can't really afford to drop that much.

Rob R.