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

borezack · 05-29-2009, 02:30 PM

There is no local Toyota dealer here. The closest one is over 130 miles away.
Will 85 octane damage the engine?

mryaris · 05-29-2009, 09:21 PM

Quote:

Originally Posted by borezack

Will 85 octane damage the engine?

No. 85 octane is used in locations with high altitudes because it behaves like 87 does at lower altitudes/sea level. I live in Colorado and regular is 85, mid is 87 and premium is 91.

So.....to clarify a bit, high altitude 85 octane= the 87 octane that all the low-landers use, so using mid-grade 87 is not necessary.

SilverGlow · 05-30-2009, 02:04 AM

As the altitude goes up, the requirement for high octane goes down.

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05-29-2009, 02:30 PM	#1
borezack Drives: 08 Yaris Sedan Join Date: May 2009 Location: Ut Posts: 3	There is no local Toyota dealer here. The closest one is over 130 miles away. Will 85 octane damage the engine?

05-30-2009, 02:04 AM	#3
SilverGlow Banned Drives: 2007 Yaris Hatchback Join Date: Oct 2008 Location: Southern California Posts: 189	As the altitude goes up, the requirement for high octane goes down.