---
id: guide-0014
title: "What fluids and filters does my car need, and when?"
category: guide
subtopic: maintenance-fluids
page_type: guide
source_url: "https://www.castlecadillacmchenry.com"
tags: ["maintenance", "fluids", "filters", "schedule", "guide"]
questions:
  - "When do I change engine oil?"
  - "How often should I replace air filters?"
  - "What about transmission fluid and coolant?"
  - "Where can I get replacement filters?"
related: [maintenance-schedule, ordering-parts, maintenance-brakes]
dealer: Castle Cadillac McHenry
---

Regular fluid and filter changes keep your engine running smoothly and extend vehicle life. The intervals vary by vehicle age, mileage, and driving conditions.

## Common Fluid & Filter Service Intervals
**Engine oil & filter:** Every 3,000-10,000 miles (check your owner's manual). **Engine air filter:** Every 15,000-30,000 miles. **Cabin air filter:** Every 12,000-15,000 miles. **Transmission fluid:** Every 30,000-60,000 miles. **Coolant:** Every 30,000-100,000 miles. **Brake fluid:** Every 2-3 years. **Power steering fluid:** Every 50,000-100,000 miles.

## Choosing the Right Products
Using OEM (original equipment manufacturer) fluids and filters ensures optimal performance and protects your warranty. Castle Cadillac McHenry stocks genuine parts for your vehicle.

## Schedule Your Service
Our Service team can help you stay on top of all fluid and filter replacements. Call **(779) 265-4427** to book an appointment or ask about our maintenance packages.