I have a neighbor who is 94 now, he takes me places.
Last time we hit the woods in his truck we kinda got turned around a little.
He hauls azz on the back roads and makes a lot of random turns.
We came to a jct. of two two dirt roads and I asked him if he knew where we were as he randomly turned again.
He just said we couldn't be lost cause we still had 3/4 of a tank of gas.

Just after he turned 90 he came over and told me he needed some help.
He couldn't get the five gallon jug of diesel up to the tank on his backhoe, it was just too much.

Took me a few minutes to get there and by the time I did he was done with it and the hoe was idling along warming up.
Said he found he could do two 2 1/2 gallon jugs just fine.