At 10:52 PM 1/22/2002 +0000, you wrote: >1)I dont have radials, they are the originial 9.50-14 type Silvertown bias >ply tires. Interesting. There are at least a few people around that prefer originality over roadability and handling. Its up to you I guess. Its surprising to me that you can even get these tires. >2)I always have my GPS running which is accurate to 15 feet and .1 mph >anywhere in the world. My odometer is correct. Even more interesting! Odometers of the period were more accurate than speedometers and usually within 1 or 2%. Some were "perfectly" accurate, and it appears yours is one of them! >3)I think the biggest deviation is from driver habit. Certainly, but when we say at 70 mph constant cruising I get .... MPG, we are trying to get the "driver variable" out. It may not be completely out, but it is to some degree... D^2