I want to take a 20-liter jerry can with us on a trip to Idaho this weekend to see the eclipse. The government expects huge influx of people there and the road service in those areas is very sparse from what I have heard. I have three relatively new 20-l red plastic cans. Problem is, they all smell when filled with gasoline, which leads me to believe all of their caps are leaking a bit. OK for emergencies, but not OK to have in a vehicle for long travel. There are metal ones on amazon marketed as "NATO Jerry Can" for $80US, but buyers' feedback says that with the new regulation spouts, they leak too.
Does anyone have good experience in how to 100% leak-proof a plastic gas can cap?
Here's mine:
