You are correct, I meant that Toyota has no idea what they are talking about. Both engines are the same and both can adjust to regular or premium fuel. I think in reality the difference should be more than 2 hp if comparing regular vs. premium. It's very strange that they decided to separate those only by 2 hp.
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Originally Posted by chiplee
Can't tell if troll or serious. Toyota made the comment. I called it "milk toast." Higher octane fuel doesn't "contain more energy", but it "allows" an engine to make more power by allowing more aggressive timing and higher cylinder pressures before spark knock or detonation occurs. It seems the LX570 squeaks out an extra 2hp because the ECU is happier on 91 octane. I think it would just as happily detune itself 2hp when it sensed knock from running 87 octane and there would never be an issue.
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