mikieboyblue — The Continuously Variable Transmission (CVT) is achieved by the use of a planetary gear set that combines the ICE's and MG1's outputs. As a consequence, even when you drive at a constant speed, the ICE's speed is varying all the time as a function of road conditions and accelerator demands. This means that, even with the cruise control on, the ICE is not being kept at a constant rpm all the time. Moreover, the ICE's speed stays in the moderate range of 1000 - 3000 rpm unless you tromp on the accelerator. This being so, I see no need to do anything more than to avoid excessive acceleration for the first ~1000 miles, as the Owner's Manual suggests.

Stan