Alright, I ain't no techie (you can trust everyone on the Board to confirm that fact) but here's what this ignorant lawyer would do:

1: Get a bunch of really big buckets/ 5-20 gallon containers, and put them under the fuel quick / check drain valves under the wings drain all of the fuel out each side.

2: Then . . . go to a fuel pump and fiill up all tanks on the plane and see how much fuel the plane takes.

3: That should give you a pretty good indication whether the log books, representations, etc. were right.

It will be the best money you've ever spent on fuel in your life, one way or the other.

My own unsolicited opinion (MYUO)

Keven
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T360