Absolutely not true!
My car has never had anything other than 93 and it chirps.
Quote:
Originally Posted by Artie_z
This 100% not harm the car. The chirping is a character trait of using 91 octane not the recommended 93. Has to do with pump lubrication viscosity.
Which creates this noise. Toyota has just developed a new pump that will
Not produce this noise and operates the same. This is something will beg you to do. I didn't really care to much because I was aware of the issue and that it was harmless. But they did not want to take chances
The fix does work
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