2003 Toyota Matrix Regular Unleaded vs. High Octane

2003 TOYOTA MATRIX
70,000 MILES • 4 CYL • 2WD • MANUAL
Avatar
MVOOSEN
  • MEMBER
  • 1 POST
Is it harmful or helpful to use high octane fuel on a unleaded fuel only tank? I know that the high octane burns hotter and helps clean out the engine. Correct me if I'm wrong. Are there any other benefits of this or harmful effects?
Jul 7, 2009 at 3:41 AM
Advertisement
Avatar
MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
High octane than what is recommended for your car is a waste of money. It has a different flashpoint, and will affect the engine timing. NOT used to clean anything! Combution chamber cleaner is made for that job! High compression engines require high octane. Leaded and unleaded are what counts as far as damageing the engine, using higher octane unleaded gas in a car made for regular unleaded wont harm it, but wont do any cleaning....they sell detergent gasoline in all grades!
Jul 7, 2009 at 3:53 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle