Type of Fuel?

2007 TOYOTA RAV4
300,000 MILES • 2.4L • 4 CYL • AUTOMATIC
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VICTORBZE
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Hello, I have been using Premium Fuel and my Catalyst went in (Check Engine Light came on). Some mechanics told me it was because I was using Premium instead of Regular Fuel. Other mechanics tell me fuel has no issue on the catalyst. Now I don't know what it is. Please help.
Oct 10, 2023 at 1:42 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,238 POSTS
The higher the octane rating the more work the engine can do, so if you are towing or doing high performance driving use the higher-octane fuel, if you are just driving around town, you can use the lower octane fuel.

This guide can help:

https://www.2carpros.com/articles/understanding-octane-ratings-when-to-use-high-octane-fuel

Please let us know if you need anything else to get the problem fixed.
Oct 10, 2023 at 3:28 AM
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VICTORBZE
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Thanks for the reply, but I am still trying to find out if the type of fuel that I am using (Premium) had an effect on my damaged catalyst.
Oct 10, 2023 at 3:36 AM
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STRAILER
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  • 55,238 POSTS
Sorry, you should be using unleaded fuel only.
Oct 10, 2023 at 10:40 AM
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VICTORBZE
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Thank you very much.
I have one Final question before I close this thread:
Is unleaded the same as Regular Fuel?
Just want to make sure 100%.
Thanks once again.
Oct 10, 2023 at 10:45 PM
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STRAILER
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Most fuel is unleaded which it can tell you on the pump it is being dispensed from. There are both regular and premium grade unleaded fuel.
Oct 11, 2023 at 12:53 AM
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VICTORBZE
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Thank you very much.
Your assistance is very much appreciated.
Oct 11, 2023 at 12:57 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,238 POSTS
You are welcome.
Oct 12, 2023 at 1:22 AM
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