---
id: department-0005
title: "Why are oil and fluid changes important, and when should I get them?"
category: department
subtopic: service-oil-change
page_type: department
source_url: "https://www.castlecdjrchesterton.com"
tags: ["service", "oil change", "fluids", "maintenance"]
questions:
  - "When should I change my oil?"
  - "What fluids does my car need?"
  - "How often do I need a fluid change?"
related: [service-maintenance-overview, service-scheduling, service-multipoint]
dealer: Castle CDJR of Chesterton
---

Oil and fluid changes are the foundation of vehicle health. Fresh oil keeps your engine running smoothly, reduces wear, and helps maintain fuel efficiency. Transmission fluid, coolant, brake fluid, and power-steering fluid all play critical roles in keeping different systems working properly.

Most manufacturers recommend oil changes every 3,000-7,500 miles (or as specified in your owner's manual), though intervals vary by vehicle and oil type. Other fluids typically need attention at longer intervals.

**Don't guess-let us help.** Our Service Department knows your vehicle's exact maintenance schedule and will recommend the right fluids at the right time. **Call (219) 250-9487** to schedule your next fluid service or ask about a maintenance plan.