Fiat and Cummins in court

It's really the odd circumstances that this system doesn't work well.
Extreme mudding and fine blowing snow.
As said above, I have experience with the latter and a fuel cap is IMO, a necessity for that condition.
Otherwise, yes it's an inconvienence to use the special funnel.
Just like it's a ?!!!!@$ ing inconvenience to fill fuel cans with these stupid new vapor catching pump nozzles.