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Anybody noticed using cruise control raises the RPM 2-300?


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I would like a Subaru engineer to explain to me why both regular and adaptive cruise control always revs the engine 2-300 RPM higher than without cruise; Ex. 1950 RPM at 110 km/hr instead of 1700. It defeats the purpose of a cruise which aims to reduce fuel consumption. I demonstrated this to a dealer, who was amazed and contacted Subaru technical support to be told that the fuel consumption remains the same. But I have doubts. I think they programmed the cruise control to stick to the CVT's simulated eighth gear of 0.559 instead of the final gear of 0.503. I don't get it.
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