Just filled up the tank with 91 octane premium fuel - Toyota Yaris Forums

ern-diz · 09-30-2016, 02:26 PM

This is such a fuzzy topic of discussion for me.

There are those that swear 91 is better for your engine than 87 is. Then there are those that swear it is not. There are those that claim 91 is only for high compression, performance engines, while others say the 1NZFE actually runs at a pretty high compression (10:1, or something??).

I used 91 for the majority of my Yaris' life and switched to 87 more recently. Can't say I noticed a difference. I don't mind paying more and I don't mind paying less - what I do mind is doing the wrong thing for my engine.

I wish there was more of a consensus on what fuel we should be putting into these cars.

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09-30-2016, 02:26 PM	#36
ern-diz View User's Garage Drives: 2007 Liftback Join Date: Sep 2007 Location: CA all day Posts: 3,794	This is such a fuzzy topic of discussion for me. There are those that swear 91 is better for your engine than 87 is. Then there are those that swear it is not. There are those that claim 91 is only for high compression, performance engines, while others say the 1NZFE actually runs at a pretty high compression (10:1, or something??). I used 91 for the majority of my Yaris' life and switched to 87 more recently. Can't say I noticed a difference. I don't mind paying more and I don't mind paying less - what I do mind is doing the wrong thing for my engine. I wish there was more of a consensus on what fuel we should be putting into these cars.