Leaderboard

shame that nobody answers a lot of these questions on here. From what I have researched and talking to Lexus certified mechanics, it appears that the eco mode has the best effect when used during stop and go traffic. The primary changes made by the system is to change the throttle profile by essentially slowing down acceleration, shifting sooner (lower rpms), and scaling back devices that cause high energy drain from the motor (IE: air conditioner compressor and internal fan speed for climate control). Because of these functions, the effect of "eco mode" would be minimal when at highway speeds or maintaining a fairly constant speed. Normal mode is quite efficient and the unique ability of this motor to switch between the traditional Atkinson cycle and the Otto cycle will yield fairly good gas mileage even with the turbo. From my experience and what I have read online most owners that track their mpg manually notice less than a 1-2 mpg gain on long trips when this mode is enabled while highway driving.