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- RDX Aspec Adv.
Their aim with cylinder deactivation is to operate at sustained cruising speed between 25mph and 50mph (40km/h to 80km/h).
Not designed to work at idle or other speeds outside the above
Oh, okay, I thought by cruising speed one meant 60+. Still, won't work above 50mph? Mazda needs to do better. On my 4400# Jeep Grand Cherokee, DoD worked up to 80mph if there was no head wind. That's a lot more weight, and a lot less sleek. Then again I suppose it was also a lot more engine displacement dropping down, too, and hey, if free is free, I guess I don't have a valid complaint.