This Could End Many Discussions... - Toyota Yaris Forums

Wattz · 11-26-2009, 12:39 AM

My original post was all from memory. If the link worked (it's the full manual), you could see that the section before that mentions that the engine may knock at times and that it's normal for it to do so occasionally. That's where my engine knock statement came from.

Considering that premium fuel would exacerbate cold start problems (regardless of the root cause), I think Ford's general statement regarding premium fuel stands well enough on its own. These small engines are designed for fuel that burns easily. Using a higher octane is working against the design.

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11-26-2009, 12:39 AM	#25
Wattz Drives: 2008 Yaris Hatch Join Date: Oct 2009 Location: Florida Posts: 36	My original post was all from memory. If the link worked (it's the full manual), you could see that the section before that mentions that the engine may knock at times and that it's normal for it to do so occasionally. That's where my engine knock statement came from. Considering that premium fuel would exacerbate cold start problems (regardless of the root cause), I think Ford's general statement regarding premium fuel stands well enough on its own. These small engines are designed for fuel that burns easily. Using a higher octane is working against the design.