Holy shewow! I may have broken the 50MPG mark, with
50.33mpg! -- though the caveat is I filled it at a different station, and the ground is not level. I will split the difference with the next tank, I think.
The SGII said ~47.25 which is still near the best I have seen. It read 9.9 gallons, whereas I only pumped >9.3 gallons. Even it comes down to 48-49mpg, I will have set a new high.
