"The Yaris is turning ~ 3000 rpm at 100 km/h"
Dear roundupready,
I assume you have the automatic. If this is true, the Yaris should be turning under 2600 at 100km/hr.
MANY people make the mistake of confusing D and 3. The difference is about 1cm from one side to the other.
Make absolutely sure the shift lever is shoved over to the D side. That will drop your rpm 600-700. I stumbled on this and the ex was renting a car to drive to Ottawa because it felt like she was sitting on top of the engine. Now she doesn't rent anymore.
Also, have gotten this feedback from friends who have rented and also some posters here. Definitely a widespread problem. If you do it wrong the first time, it becomes habit and you never know.
Keep me posted.
John M.