---
id: guide-0042
title: "What should I know in my first 100 days of new-car ownership?"
category: guide
subtopic: first-100-days-guide
page_type: guide
source_url: "https://www.castlecadillacmchenry.com"
tags: ["new-ownership", "first-time", "onboarding", "maintenance", "guide"]
questions:
  - "What do I need to do after buying a car?"
  - "How should I break in a new car?"
  - "What's the first service appointment?"
  - "How do I learn all the features?"
related: [service-plans, warranty-coverage, tech-features]
dealer: Castle Cadillac McHenry
---

Your first weeks and months set the tone for your car's long-term health and your satisfaction. Here's what to prioritize:

**Registration and insurance (week 1):**
Update your registration with the state, ensure insurance is active before you drive off the lot, and review your policy. Keep your purchase documents, warranty info, and service records together.

**Learn your car:**
Read the owner's manual or watch online tutorials about key systems-climate control, infotainment, safety features, fuel door, and basic maintenance checks. Familiarize yourself with the controls so you're confident and safe.

**First service (by 1,000-3,000 miles):**
Schedule your first oil change and inspection with Castle Cadillac McHenry's Service Department. This catches any issues early and starts your service record. Follow the manufacturer's recommended maintenance schedule.

**Drive carefully:**
Avoid towing or hard driving while the engine is breaking in (typically the first 500-1,000 miles). Gradual acceleration and varying speeds help new components settle.

**Build your team:**
Get to know our service advisors at **(779) 265-4427**-they'll support your car's health for years to come. Visit **https://www.castlecadillacmchenry.com** anytime you have questions.