June 3, 2011
does early shifting on automatic waste gas?
shifting at lower rpms save gas, but does very early shifting (by letting of the pedal) waste more gas? my car wants to shift at 2k rpm. and i let it shift at 1600 rpm, so my feet and pedal at pulsating (letting off to let it shift, pressing down after it shifts). does hauling the car like this waste more gas? source is preferred. thanks
ya, would the constant change in valve opening, actually make it waste more gas? thats what im wondering…
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Filed under Gas Conservation FAQ by on Jun 3rd, 2011. Comment. 
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Comments on does early shifting on automatic waste gas?
the lower the rpms the better mpg, rpm means rotations per minute.
I suspect that you’re actually wasting gas because anytime you’re throttling up (after letting off) the change in throttle position signals the computer to richen the mixture much like an accelerator pump on a carburetor to prevent hesitation.
Nice steady throttle for best mileage.
It depends upon make, model, year, country of origin, trans type, engine type. fluid type. It depends upon HOW the car was engineered and what it was engineered for!!!
the fuel burned has more to do with the amount of air flowing in the engine then the rpms, the amount of air flowed is directly controlled by the throttle and rpm, but mostly by the throttle.
sometimes it is better to let it rev a little higher and use less throttle, but use your judgment, 1/4 throttle and 5000rpm wont be as fuel efficient as 1/2 throttle and 1500 rpm