I waited about 1200 miles before dogging it, and took it to the track at 2400 miles where it went 7.9. I don't think it matters for shit, but personally I prefer to let the cam, crank, and rod bearings establish a wear pattern before taking it to 7k. Ring seal is only an issue on cars that wash them out (carbed, usually) or if you let it get hot causing the rings to lose tension. That's my experience, yours may vary.
Anyway, I average 17.5 to 19 on any given tank. I have gotten as low as 14 and as high as 27.8 coming back from Austin with a crazy tail wind. Highway mpg is usually around 23. That's with 3.73s and 28" tall tires.
Jason, I've never heard of that great a disparity between the dash mpg reading and calculated mpg. It's usually 1-2mpg off at worst.
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