Alright! We agreed on a 17% handycap. That is 20% for diesel vs. gasoline and an average of 300 more pounds being in my car at 1% per hundred pound.
Sources
It turned out to be 988.4 miles, and 3 tanks of fuel.
The final averages over the 3 tanks are as fallows.
Me ('79 Diesel Volvo): 40, 33.2 (after 17% handycap)
Richard ('00 Escort ZX2): 34.5
So, Richard and his Escort won...
If you would like the whole story, plus pictures of the cars and way to much numbers/calculations/information, check out my auto Blog.
http://www.RandomFlash.net/Bricks
One of my tanks I achieved 44.1 MPG (diesel), a massive personal best! I plan on making most of my temporary mods for this trip permanent. As well as doing more!
Thanks for rooting for me if you did!