Ram towing mileage

85glht said

No hate here. You drive what you want!! I thought you had to run at least 91 octane with the 6.2?

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Well that is what the engine calibration is optimized for. But it can easily handle 87 octane as well. And like I mentioned, once you have enough engine throughput (ie. torque for an amount of time) and have to cool the converters, octane doesn't matter as you have to run rich.

That said, running higher octane in an engine that's calibrated for it may improve FE, depending on the engine loads. But in this case, nowhere close to paying for the added fuel cost.