The last gas question - Toyota Yaris Forums

newyar · 04-26-2009, 11:37 PM

Geez what a series of posts. It says 87 octane is recommended because that's the octane rating the engine was designed to run on. The reason it says minimum required is because IF you need gas and 87 isn't available for whatever reason, you CAN run 89 or 92; it will run on it. However there's no benefit other than not running out of gas. It will not increase power, mileage or improve the performance above what 87 octane does. It will leave more carbon residue in the engine if you continuously run the higher octane for the reasons stated in mine and other's previous posts.

If you want to run the higher octane stuff... it's your car, your money...fill it up with what you want. Just don't be surprised if your engine gunks up sooner than everybody else's.

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04-26-2009, 11:37 PM	#33
newyar Drives: Yaris Liftback 2008 Join Date: Mar 2009 Location: SoCal Posts: 15	Geez what a series of posts. It says 87 octane is recommended because that's the octane rating the engine was designed to run on. The reason it says minimum required is because IF you need gas and 87 isn't available for whatever reason, you CAN run 89 or 92; it will run on it. However there's no benefit other than not running out of gas. It will not increase power, mileage or improve the performance above what 87 octane does. It will leave more carbon residue in the engine if you continuously run the higher octane for the reasons stated in mine and other's previous posts. If you want to run the higher octane stuff... it's your car, your money...fill it up with what you want. Just don't be surprised if your engine gunks up sooner than everybody else's.