Towing MPG

[MOTORHEAD]

Brakes on both units are good, ck'd both by me and the trailer shop( Electric on trailer}
I was present at the factory when the axles were replaced, although not close enough to verify their accuracy. They did have a crude looking jig for the job. I remember anticipating drastically improved mpg on the trip home (1200 mi) Nope!! No change at all ! still 12 mpg ! Also I was having about i blow-out per trip and asymmetrical tire wear and constantly replacing the tires that didn't blow out !
There are generally two ways to check trailer wheel alignment.
1. measure from front of coupler with string to axle tip. Distance should be the same, both sides.
2. Hold straight edge horizontaly across tire sidewall. measure distance from straight edge to frame, front and rear of each tire. Compare front and back #'s to determine toe.
I checked mine using method #2, and found both right side tires showed 1/16" toe in.
Seems about right.
However, the left showed 3/16" toe in ! Obviously both axles had been installed (welded) crooked !! I should be able to have someone cut a reweld them, moving the left side back untill there is 1/8" toe-in on both sides. If these toe dimensions were on a car, the tire scrub would make it hard to move. I fail to see why it would be any different for a trailer !