Skipping scheduled maintenance is the most reliable way to turn a $100 service into a $3,000 repair. This guide covers every major maintenance interval.
Every 5,000–7,500 miles: Oil and filter change
The most important maintenance item. Motor oil degrades over time and loses its ability to lubricate. Conventional oil: change every 5,000 miles. Full synthetic: every 7,500–10,000 miles. Cost: $40–$100 at a shop.
Every 15,000–30,000 miles
- Air filter ($15–$40 DIY) — clogged filter reduces power and can trigger MAF codes
- Cabin air filter ($15–$50 DIY) — reduces HVAC effectiveness when clogged
- Tire rotation (free with oil change at most shops) — extends tire life by 15–25%
Every 30,000–50,000 miles
- Brake fluid flush ($80–$150) — moisture-contaminated fluid lowers the boiling point, causing brake fade
- Transmission fluid service ($100–$250) — neglected fluid is the leading cause of transmission failure
- Fuel filter ($50–$175) — on vehicles with external filters
Every 60,000–100,000 miles
- Spark plugs ($100–$400) — worn plugs cause misfires (P0300–P0304)
- Coolant flush ($100–$200) — degraded coolant becomes acidic and corrodes the cooling system
- Serpentine belt inspection ($100–$250 to replace) — snapped belt = instant breakdown
60,000–105,000 miles: Timing belt (if equipped)
This is the most critical interval. On interference engines, a snapped timing belt destroys the engine — pistons hit open valves. Replacement cost: $400–$1,000. Engine rebuild after failure: $3,000–$8,000. Many modern engines use timing chains instead — check your owner's manual.