Since this keeps coming up and I've been keeping a log, below will be a link to the Excel File of my mileage log.
You'll notice some initial tweaking of the format in the beginning. As of 7/31/2006 I went to a format I like. I'm sure Colin (NHBubba) will chime in as he's doing something similar.
Vehicle: 2004 Ford Ranger FX4 Level II 5-speed manual transmission
Mileage when purchased: 2871
Configuration 1: OEM Stock
Configuration 2: overall vehicle stock, tires 33x10.50x15 BFG Mud-Terrains with 1 inch torsion bar crank
Configuration 3: RCD 5 inch torsion bar to coilover conversion kit, F31 Deaver leaf springs, 33x10.50x15 BFG Mud-Terrains
Shifting habits: If congested traffic (edit: and needing to pull out in a small gap), will power shift (taking 1st to 3500-4000 rpms before shifting)....to shifting through all gears as appropriate by speedlimit around 2000-2500. Basically I call upon power when needed and baby when I can.
To calculate my tire difference I use the formula ((33/31) X tripometer), and when gassing up I always top it off to what the automatic shutoff says tank is full.
The below xls file (Microsoft Excel) will remain active as long as possible and updated from time to time.
Mileage For 2004 Ford Ranger 4.0L 4x4
(Right click and do Save Target As [more dial-up friendly] or just click on the link to directly open)