---
id: guide-0014
title: "What fluids and filters does my vehicle need, and when should they be changed?"
category: guide
subtopic: maintenance-fluids
page_type: guide
source_url: "https://www.castlevwcars.com"
tags: ["service", "maintenance", "fluids", "filters"]
questions:
  - "When do I need an oil change?"
  - "What about transmission fluid and coolant?"
  - "How often should I replace my air filter?"
  - "What's the difference between synthetic and conventional oil?"
related: [maintenance-schedule, maintenance-brakes]
dealer: Castle Volkswagen of Schaumburg
---

Keeping fluids and filters fresh extends your vehicle's life and performance. **Oil** is the most frequent: typically every 3,000-10,000 miles (synthetic lasts longer). **Transmission fluid** typically needs attention every 30,000-60,000 miles. **Coolant** usually goes 30,000-50,000 miles. **Air filters** (engine and cabin) generally need replacement every 15,000-30,000 miles, depending on driving conditions.

**Other fluids to monitor:**
- Brake fluid (every 2 years or per manufacturer specs)
- Power-steering fluid (as recommended)
- Windshield washer fluid (as needed)

Your vehicle's owner manual and dashboard warnings are your best guides. Castle Volkswagen of Schaumburg's Service department will walk you through what your specific model needs and when. **Call (847) 593-4700 to schedule a fluid and filter check**-we use genuine OEM parts to keep everything running smoothly.