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Originally Posted by SmireyFase
I don't know the reason behind the chirp but it is definite amongst drivers in California. I think it has to do with the ethanol content of the gas.
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Quote:
Originally Posted by venom_5
I know of several people who run E85 tunes.... so wouldn't their crickets be like dragon sized?
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Originally Posted by sly
It's possible that it's not the ethanol itself, but the additives used to mix ethanol and gasoline together. A lot of people with e85 don't seem to complain about the crickets (or they don't care).
I just hit 10,000 miles on my 2016 BRZ and still don't have any crickets. However I have never put a drop of ethanol in my car. Luckily there are 2 ethanol free gas stations within 5 miles of my house that sell 93 octane E0.
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Ethanol, not additives, is the key. Not even going to bother going back, but basically the ethanol content of the gas makes it easier to create cavitation in the pump, which causes the chirp. Just to reiterate other points, this does not appear to create any long-term damage to the system. I am in the mid 50s milagewise, and no appearance of degredation.
As far as e85, it has to do with the mixture. Since E85 has a much higher ethanol content, the way it behaves when its going through the pump is different.