Slip and turn nicely describes the thixotropic (
http://en.wikipedia.org/wiki/Thixotropy) behaviour of his starch/water/oil (?) cooking mixture in a mouthwatering way in 1256 but I doubt that the likely BA038 fuel problem lies in this direction.
I am pretty sure that the kind of molecules (yes I know about the ionics that may or may not be there too!) you need for this sort of thixotropic behaviour, will show up big time on the standard battery of NMR/MS/IR analytical weaponry available to AAIB.
We'll see!
CW