Complete maintenance guide for cars, trucks, and commercial vehicles. Keep your vehicle running safely.
| Service | Interval | Priority | Notes |
|---|---|---|---|
| Oil & Filter Change | Every 5,000-7,500 miles | critical | Synthetic oil may extend to 10,000 miles. Check owner's manual. |
| Tire Rotation | Every 5,000-7,500 miles | important | Promotes even wear. Do at every oil change. |
| Air Filter | Every 15,000-30,000 miles | moderate | Check more frequently in dusty conditions. |
| Brake Inspection | Every 12,000-15,000 miles | critical | Replace pads at 3-4mm thickness. Rotors when scored. |
| Transmission Fluid | Every 30,000-60,000 miles | important | Automatic transmissions may need earlier service. |
| Coolant Flush | Every 30,000 miles or 5 years | important | Prevents overheating and corrosion. |
| Spark Plugs | Every 30,000-100,000 miles | moderate | Iridium plugs last longer than copper. |
| Timing Belt/Chain | Every 60,000-100,000 miles | critical | Failure can cause catastrophic engine damage. |
| Serpentine Belt | Every 60,000-100,000 miles | important | Check for cracks, glazing, or fraying. |
| Battery | Every 3-5 years | important | Test annually after 3 years. Extreme temps reduce life. |
| Wheel Alignment | Every 12,000 miles or annually | moderate | After hitting potholes or curbs, check sooner. |
| Cabin Air Filter | Every 15,000-20,000 miles | low | Easy DIY job. Improves A/C efficiency. |
| Power Steering Fluid | Every 50,000 miles | moderate | Check for leaks if steering feels heavy. |
| Differential Fluid | Every 30,000-50,000 miles | moderate | Critical for AWD/4WD vehicles. |
| Service | Interval | Priority | Notes |
|---|---|---|---|
| DOT Annual Inspection | Every 12 months | critical | Required by FMCSA for commercial vehicles. |
| DPF Regeneration/Clean | Every 200,000-300,000 miles | critical | Forced regen if warning light appears. |
| DEF (Diesel Exhaust Fluid) | Every 5,000-10,000 miles | important | Vehicle will derate if empty. |
| Fuel Filter (Diesel) | Every 15,000-25,000 miles | critical | Water separator should be drained regularly. |
| Clutch Adjustment | Every 50,000 miles | important | Check free play and wear indicator. |
| Wheel Seal & Bearing | Every 100,000 miles | critical | Failure can cause wheel-off events. |
| Air Brake System | Every 12,000 miles | critical | Check slack adjusters, chambers, lines. |
| Fifth Wheel Inspection | Before every trip | critical | Grease regularly, check for wear. |
Regular vehicle maintenance prevents costly breakdowns, improves fuel efficiency, extends vehicle life, and ensures safety. Following the manufacturer's recommended schedule is the most cost-effective way to protect your investment.
Commercial trucks have stricter maintenance requirements due to DOT regulations. Failing to maintain proper records can result in fines, out-of-service orders, and increased CSA scores.