---
id: faq-0082
title: "What's the difference between synthetic and conventional oil, and which should I use?"
category: faq
subtopic: service-and-maintenance
page_type: faq
source_url: "https://www.castlesubarumchenry.com"
tags: ["oil", "maintenance", "engine care"]
questions:
  - "Should I use synthetic oil or regular?"
  - "What's the best oil for my Subaru?"
  - "Is synthetic oil worth the extra cost?"
related: [service-appointments, maintenance-costs]
dealer: Castle Subaru McHenry
---

Conventional oil is mineral-based and works well for many vehicles. Synthetic oil is engineered for superior performance-it lasts longer, protects better in extreme temperatures, and keeps your engine cleaner. Most modern Subarus recommend synthetic or synthetic-blend oil for best protection and longer intervals between changes.

Your owner's manual specifies which type your Subaru needs. Castle Subaru McHenry's service team uses the right oil for your model and can explain the benefits and costs of each option.

Unsure which is best for your car? Call (779) 601-0797-our advisors will help you choose based on your driving habits and budget.