I own a 1999 Nissan N15II Pulsar SSS manual with the SR20DE engine. I rarely drive the car so it has done only 24,681km. It was last serviced in January at 21,364km. How long should I go before the next service? Due to warranty concerns it was serviced every six months, but now the warranty has expired it seems a bit ridiculous to service it after only doing 3000km.
I would recommend sticking to the six-month service interval even if you aren't doing a lot of miles. If you really want to extend the periods to save some money I wouldn't go beyond 12 months. A well-serviced car typically is a more reliable car.