Originally Posted by
TheOddOne
It's similar for Jet fuel though of course the dye is straw-coloured.
Err, no. If there is Dye in Jet fuel it is off spec. Kero is naturally water white to straw-coloured; the only marker allowed is not visible, and is only detectable by analysis.
Overall though, an appearance test for Avgas and/or Jet is a perfectly acceptable way for either a technical or non-technical person to determine whether fuel dispensed from a bowser may be contaminated. More subtle contaminations that can only be determined by analysis are unlikely to arise once the product has reached the airfield tank.
M9 (Investigates fuel contaminations for a living, currently in Mozambique sorting out $5mill worth of contaminated gasoil)