I've had one in use for about 10 yrs and it works like a charm. I use it strictly for my New Holland tractor. Every now and then I see some **** in the bottom.
Worth getting for diesel fuel in my opinion.
btw...2 other guys here in the shop use one as well
I've got one I've used for kerosene. Works good, separates water from fuel well. I don't remember the model, but its a decent size funnel about 4-5 inches wide. I use it when transferring kerosene from barrel to a smaller can.