Quote:
Originally Posted by Fancy
I dont feel like reading through all of this, but do those of you that have the chirping noise use 93? I can only get 91 where I live and have not had the chirping noises.... I drove to North Carolina 2 weeks ago and once I got to Illinois and had to stop for gas I could get 93 so I did... Well after a couple fill ups with 93 (filling up at half tank, so it was 93/91 mix) to get a full tank of almost completely 93 fuel from Shell I started hearing the chirping noise... I had the crickets the whole week and a half I was in North Carolina... I got back last Sunday and filled up with 91 and drove around for a bit... NO MORE CRICKETS!
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Sort of. While you're right that it's the fuel causing it to chirp (more or less), it's not the octane rating, it's the ethanol content. It's possible the area you live in has a lower ethanol content in 91 octane gas than 93 in other parts of the country. In my personal experience, Shell gas seems to exhibit the chirps more than other gas. Others have reported different. But there hasn't been any correlation between OCTANE rating and the chirping. Just a coincidence.