Diesel is a bugger of a fuel to track.
It lubricating properties mean it can seep everywhere and
soak into places we'd never think of.
Umpteen tiny return hoses from injectors,
Connections between return hoses in the V,
Flexible hoses from firewall to engine,
The hoses from the tank are a harder plastic,
Any dirt will visually mask a small leak too.
Best of luck and if you're going through Townsville,
give me a hoy