---
id: faq-0068
title: "What's the difference between synthetic and conventional oil?"
category: faq
subtopic: service-and-maintenance
page_type: faq
source_url: "https://www.castlecdjrchesterton.com"
tags: ["oil", "maintenance", "performance"]
questions:
  - "Should I use synthetic or conventional oil?"
  - "Is synthetic oil worth the extra cost?"
  - "What oil type does my vehicle need?"
related: [oil-change, fluid-checks, maintenance-schedule]
dealer: Castle CDJR of Chesterton
---

Conventional oil is refined from crude oil and works well for many vehicles, while synthetic oil is engineered in a lab to provide superior protection, especially in extreme temperatures and high-mileage engines. Synthetic oil typically lasts longer (up to 10,000 miles between changes versus 5,000 for conventional) and flows better in cold weather.

Your owner's manual specifies which type your Jeep, RAM, Dodge, or Chrysler requires-some newer models require synthetic. While synthetic costs more upfront, the longer intervals and extended engine protection often make it a smart investment.

Our Service team at Castle CDJR of Chesterton can recommend the best oil for your vehicle's needs and specifications. Call (219) 250-9487 and let's discuss which option is right for you.