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octane

  1. Gas Octane question

    General Challenger Discussion
    Hi folks, I am used to running 91 octane in my cars so it's no big deal my Challenger R/T requires it. However, I was looking through the manual and noticed that automatic transmissions could use 89 octane but manual transmissions had to use 91 or higher. What is the difference in transmissions...
  2. 13 Challenger Six Speed Transmission

    General Challenger Discussion
    ive read a couple posts about this but still havent answered clearly my question. On the vehicle manual it says ( for manual transmissions ) that 91 octane is recommended. But i live in North Carolina where the gas options at gas stations are 87, 89, 93. So which should i use? the 89 or the 93...
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