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The more instant you blip your throttle, the more fuel you will use, at least if your car is drive by wire. If I gently squeeze into the throttle, RPMs go up slowly, and I get up to desired gal/hour (3). When I quickly go onto the throttle, for about half of what I do when I slowly squeeze, the RPMs jump up to 2.5-3k and I get about 4 gal/hour for a few seconds, then down to what it is supposed to be, which is about 2 gal/hour.
I haven't found any BSFC charts for my car in particular, but others with the same displacement seem to say that between 3 and 4k RPMs is where I get the most torque per drop of fuel used.
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