Super Six fuel mileage

Like dartdoctor said. Its got 200,00+ on it now. But around tax time, I should have a different motor in it. I'm just curious as to what all everyone gets with theirs. I know what the tired motor is gonna get. The single barrel is getting around 30 with good plugs in it.

There is no way your /6 is getting 30mpg. They never have and never will.
18-20 mpg is the most that has been posted here.