I think its mostly weight in my case combinded with led foot syndrome.

I mean if you saw just how much stuff i carry with me at all times you could think I was nuts. 2 bottles mixed coolant, 6 bottles of oil, 6 bottles ATF, 2 brake fluids, gallon gear oil, wheel bearing grease, maf cleaner, etc, etc. Plus theres recovery straps, extra hitch ball, compressor, full tool kit, survival kit (incase I get stranded), hoses, jumper cables, etc, etc.

I believe in being prepared after I got stuck once in a monsoon like weather in my old F250. I nearly froze, had no food or water and no way of getting any help but walking in my running shoes as the cell had no reception. Since then I carry everything possible I can that I can use. And man more than once alot of it saved my ass.