Quote:
Originally Posted by switchlanez
It's in one of the manuals. I copy/pasted the info into one of my posts few days ago from one of those .pdf files published on STIS for the BRZ:
●Use only gasoline containing a maximum of 10% ethanol.
DO NOT use any flex-fuel or gasoline that could contain more than 10% ethanol, including from any pump labeled E15, E30, E50, E85 (which are only some examples of fuel containing more than 10% ethanol)
●If you use gasohol in your SUBARU, be sure that it has an octane rating
no lower than 93 AKI.
●●SUBARU DOES NOT recommend the use of gasoline containing methanol
■Fuel types
Unleaded gasoline (93 AKI [Research Octane Number 98] or higher)
If unleaded gasoline with an octane rating of 93 AKI (98 RON) is not available,
unleaded gasoline with an octane rating of 91 AKI (95 RON) may be
used with no detriment to engine durability or driveability.
--
My dad just read some posts from people who switched from 93 octane w/ ethanol to 91 octane w/o ethanol had the chirp go away. So it may actually be the additives in people's fuels (ethanol) that increase likelihood of chirping.
Also my buddy with an FR-S noticed the chirp was less apparent when he filled with 93 but recently he had to use 91 and the chirp came back more pronounced. He had no comment whether ethanol was in either.
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thats because of ecu tuning.... not the components. people running e85 with a tune arent having issues