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885 Posts
Setting the transmission in manual mode while running on Cruze control won't do diddly to improve mileage. The transmission is still using the same gear and torque converter. All manual mode does is to allow you to choose when to shift.
I've done long distance drives at 70 mph and got as good as 38.5mpg in my 2LT.
I've done long distance drives at 70 mph and got as good as 38.5mpg in my 2LT.
