Before you buy one, try and stick a tube down your fuel neck. Most newer vehicles won't let you. I'd rather have someone try and fail, than get pissed off because there is a cap and either pry it off or do other damage. If you can't get a hose down the neck neither will they and most likely move on.
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor