The bigger issue is: is it worth it?
Ecomodding makes sense on a older car.
But in newer cars, when there is so much pressure on manufacturers to I crease corp mpg, do you REALLY think that they have left MPG's on the table?
Look at all the trouble dodge went to to achieve class leading mpg on a truck! The actually have an active dispersion to lower the body 1" to improve aero at speed.
I would bet that Toyota has a reason for the rpm NOT to drop.
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