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Originally Posted by 91CivicHatch
Ryland, thanks for that explanation about gas. That makes sense because this morning I tried another test. I filled up at the same station as light night and numbers were 27mi/.78g = 34.68mpg. Then I filled up when I got closer to work and got 12.8mi/.836g = 15.4mpg. There is no way in my car I could get that low on a tank, and since the temperature here was near freezing, that could have played a roll (or the gas pumps could be different).
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The errors and inconsistencies (tilt angle, nozzle insertion, flow cut-off) when filling up the tank is going to be huge with such small fills.
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I had read about DFCO, so I do use that sometimes. I was trying neutral from a far distance to get me to the light, but I may try more DFCO this time.
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Coasting in neutral is more fuel efficient than DFCO from my experience.
I was using DFCO a lot, and driving a lot slower, but it's coasting that finally improved my fuel economy beyond what the car is officially rated for.