At one time we had about 10 gas cans with gas and 5 with diesel fuel. I don’t know what we have anymore since that’s not my area of expertise. But I think I will politely ask tomorrow just to make sure he hasn’t forgotten his job. Especially with gas at $1.69 a gallon!
Hubby used to do the same thing. He would fill up the vehicles from the cans and then replenish the cans. Fairly labour-intensive, but I always felt better when we had a hint of earthquakes or anything like that in California to know we had the fuel to get to the mountains.
Diesel is more stable than gas.
There are additives you can add to both to increase their shelf life.