Some notes on fuel consumption. I have finally got the fuel mixture about where I want it. I am idling at 700 reliably, though I am still dealing with a sticky throttle that every once in a while holds it at 1200. My choke is coming on and going off right, it gives the right amount of fuel at start, and absolutely never pings. The header only glows after my punishing run up Alba Rd. So I am happy with all that.
My commute: 35 miles (one way). My elevation ranges from 25' ASL to nearly 2000'. For 2/3 of the drive, I am rowing between 2nd and 3rd gear (3000-4000RPM), with brief forays into 4th. At the end of a long drop, I get to accelerate quickly to freeway speeds and do the last 10 miles at 65mph.
I fill the tank when it has 2 gallons remaining. I always fill at the same station, using the same pump, giving it one top-off full speed spurt that nets me an additional .3gal.
When I run regular, I average 20mpg. I recently switched to premium (at an additional cost of $.20/gal, or $2/tank) and gained roughly 2mpg. Put another way: For $31.00, I can go 200 miles. Or for $33.00, I can go 220 miles. Or: on regular, I pay $.155/mile. on premium, I pay $.15/mile for a savings of $.005/mile. If I average 350mi/week, that means that I can add fries to my order at Jack in the box once per week just on the money I saved by switching to premium fuel (not to mention it burns cleaner, runs smoother, and is guaranteed to keep my truck from ever turning into a gila monster.
Good stuff.
EDIT - did I do that math right? cost analysis always screws me up...