I see the discussion seems to have shifted from getting the most accurate mpg figure for a given fill to getting the longest range on a fill. For range, the semi I used to drive averaged about 6 mpg but had a range exceeding 1100 miles at mostly highway speeds. I never ran it dry and usually filled it about once per day at somewhere around 500 miles. Its secret to long range was simple - two saddle tanks holding over 100 gallons each.
....the semi I used to drive averaged about 6 mpg but had a range exceeding 1100 miles at mostly highway speeds. I never ran it dry and usually filled it about once per day at somewhere around 500 miles. Its secret to long range was simple - two saddle tanks holding over 100 gallons each.
Ah...so you carried an extra one hundred gallons(700 pounds of diesel) that you never used. If you would have carried 100 fewer gallons, your mpg would have been higher.
Ah...so you carried an extra one hundred gallons(700 pounds of diesel) that you never used. If you would have carried 100 fewer gallons, your mpg would have been higher.
You can apply the exact same argument to everyone else who tops off the tank instead of carrying only the fuel needed for the trip.
By the way, airlines make a fine art of carrying only the fuel needed for their trip, plus legally mandated reserves.
zeusstx 
Hybrid Mode
