Cruising RPM.

[tainopayute]

That is why I was first asking if getting RPM,s of 3,100 while cruising at 70 mph was normal in the RS with a manual transmission because other Sonics, like yours, get different RPM's when cruising at highway speeds.

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But maybe the auto transmission has different gear ratio than the manual... ?

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[Palmaris]

But maybe the auto transmission has different gear ratio than the manual... ?

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Yup, they sure do.