How did you do your calculations? Did you you do them manually or rely on SGII? I had my SGII telling me that I was getting 34.xx mpg to the tank on my S2000, but when I filled up from the same gas station/pump and manually calculated the mpg it was 30.27 mpg. Ofcourse, this was before I calibrated the SGII. Now that I have it calibrated, I am hoping that my manually calculated mpg matchs the SGII tank mpg.
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