Where I work they only fix things after they break. They do oil changes but no other preventive maintenance. All nissan hard body, frontiers and toyota tundras. Just traded a tundra with 250,000 miles, was still running good. Nissans all have 160-210,000 miles. No timing belts have ever been changed. My son just had his done on his toyota solara at 120,000. The old one looks absolutely like new. Just wondering how critical the 90,000 recommended change is. Maybe it is because of the consequences if one does break.