What is the 30-60-90 rule for cars?

The 30-60-90 rule for cars refers to recommended maintenance milestones at 30,000, 60,000, and 90,000 miles to keep your vehicle in optimal condition. At each interval, mechanics inspect and service key components such as the engine, transmission, brakes, belts, hoses, and fluids. Following the 30-60-90 rule for cars helps prevent costly repairs, maintain performance, and extend the lifespan of your vehicle.