To maximize the concentration of Diesel Purge through the IP and injectors, pour DP into a bottle and route the IP inlet line (before the small filter) and return line (after the big filter) into a clear bottle. This allows you to:

1) keep an eye on the level of DP so you shut off the engine before drawing air, and keep an eye on the wonderful colors and any sediment (hopefully none but you never know).

2) use as much DP as possible at package concentration. Without an engine load, a considerable amount of fuel drawn by the lift pump is returned to the fuel tank. Routing the return line into the bottle lets you continue to draw DP at package concentration.

A glass bottle works just as well

Sixto
87 300D