---
id: faq-0073
title: "What's the difference between synthetic and conventional oil?"
category: faq
subtopic: service-and-maintenance
page_type: faq
source_url: "https://www.castlekiamchenry.com"
tags: ["oil", "maintenance", "engine-care"]
questions:
  - "Should I use synthetic or regular oil?"
  - "Is synthetic oil worth the extra cost?"
  - "What type of oil does my Kia use?"
related: [oil-change, service-schedule, maintenance]
dealer: Castle Kia McHenry
---

Synthetic oil lasts longer (often 7,500-10,000 miles vs. 3,000-5,000), flows better in cold weather, and protects your engine more thoroughly. Conventional oil is less expensive but needs more frequent changes.

Many modern Kias (especially turbocharged engines) perform better on synthetic or synthetic-blend oil. Your owner's manual specifies the right grade for your model.

Castle Kia McHenry stocks both options and can recommend what's best for your engine and driving habits. Synthetic may cost more upfront, but longer intervals often mean fewer visits and better long-term value. Call (815) 453-8566 to discuss which oil is right for your Kia and schedule your next change.