If at all possible don’t use them. There is no advantage, the time saved in the high flow rate is offset by the time waiting for the froth to settle.
There are some areas however where you do not have a choice, it is the only diesel bowser available. If you have one that lets the nozzle fully into the filler, then you need to be careful about having the trigger fully open. If the nozzle is too large, you can get funnels.
The flow rate will cause blow back because of a little flap that can close, see this old thread for a work around for that. - Fast Fill pumps
This lets the air escape as the fuel rushes in.
I'm just want it for the "shorter headlamps".
MY14 GC Limited, 3.0 CRD, Lux II, Granite Crystal, 18" Wheels, Tubular Side Steps.
Could I get my avatar much larger?
Ordered: July 7 2013 Delivered Nov 25th