That sounds awful Acropolis50.

I’d rather not carry any aerosols in the trunk but I’ll look into adding a liquid alternative.

Chaos: The penetrating oil I use is, Liquid Wrench. My can is old and it’s a couple of ounces in a metal can, like the old “ 3 in 1 Oil” can. A quick Google search showed me you can still buy the same, liquid product in a 4oz. plastic bottle, for about $5, plus shipping. Maybe u can also find it in a good local hardware store.

Liquid Wrench is one of my "go-to's". Thanks!

Wd-40 isn't designed to be a penetrating oil though is will some but an actual penetrating oil will do better.
But this is why I bought the battery powered impact wrench, I've broken enough bolts and busted enough skin that its worth it to let the tool do the work now a days.