Lug nuts of course..i had to do a tire change on my seldom used Canoe Car to get it ready for the season.WD-40 stuff and a long breaker bar were the only thing that would budge them.
if you were packed up and getting out of town with a million other cars outrunning a hurricane or----insert your disaster here---i don't think you would want to be by the side of the road jumping up and down on a dealer supplyed L wrench freaked out that the kid who put the tire on used a impact wrench at it's full setting..i went around to all the tires and made sure every lug nut could be removed with that X wrench by hand.
a remote canoe landing would be just as bad as the freeway out of Savannah..

Phew, that's a knuckle-buster.

I occasionally use a product called Liquid Wrench for otherwise impossible jobs. Reading the label, you realize it's totally evil stuff. But it works wonders.

With smaller cars, there's a good reason for that stubby little lug wrench. The recommended torque is quite low (76 ft-lb for my old Toyota and 85 for the Mazdas). I learned the hard way, using the wrench from an old GMC pickup and snapping a couple studs clean off the Toyota. Whoops. Now I use a torque wrench.

Hey Canoedogs,

Good advice to check your lug nuts. I have had more than my share of problem flat tires in the bush.

If the lug nuts are on too tight, I also use a penatrating oil, but if you do not have that try Bug Dope (100% Deet Repex I think it was), I have had it work for me in the past.

I have used the hollow handle of a Jack-All many times as a cheater bar on the wrench and it works well.

Once I twisted the socket head off an X wrench and had to make a Sat. Phone call for a wrench to be delivered to me, that was expensive.

Twice my tire changing problem was due to not being able to lower the spare tire from under the bed of the truck, due to corrison in the lowering assembly. Once I had to call for a flatbed, the other time my helper had small enough hands that he reached in with my Leathernam and snipped the cable.

Mike

Good advice, have had lug nuts that required a cheater bar to get loose. While you are checking out the lug nuts don't forget the spare tire. Check the air pressure and if on a truck or other vehicle where it is lowered by a chain or a cable make sure that works too.

Another trick if you're without a cheater bar and have one of the verticle post bumper jacks is to use it as a mecanical lift.
Just place the ratchet star on the lip and start cranking.

I get an old rim, the same size that's on the car now, and when I get new tires I have them put the best old tire on the extra rim and store that in the trunk where the tiny spare was. It is higher than the well is deep, so I just throw a fabric tarp, then a plastic tarp over it,pack my emergency car kit around that, and I'm good to go. Sure beats either having a totally useless (flat) spare, or a small spare that's not recommended over 55 mph.

I also duct tape an extra car key on the back of my license plate. I don't trust the magnetic key holders, as years ago I lost one. Also by doing this, it keeps you out of the dirt, wet, grease, etc. if you happen to put the magnetic holder somewhere more creative and hard to reach (lot less likely for someone to find).

Swamp..only someone north of the Cross Canada Highway would think of using bug juice on rusty bolts--
Barbakene..i'll do that full spare trick.that small donut would not last long on the washboard gravel "roads"

Generally when I have wheel work done I try to remember to request they finish tightening the nuts with a torque wrench or calibrated air socket. Most good shops have the later and if used they make over-tightening pretty hard to do.

IMO if the lug nuts have been tightened that tight you might seriously consider replacing the bolts. Over time the bolts corrode and stretch and fatigue. It is entirely possible for fatigued bolts to snap if you hit a bump.

Fortunately in all the vehicles I know about the replacement bolts are just a couple of bucks a pop and are easy to replace.

For budging rusty fasteners Kroil is better than WD-40 by far.
(but use what you have)

A proper socket and long breaker bar for the lugnuts (and the lugnuts after the chrome cap falls off) goes into all the cars.
Busting the cheap OEM lugwrench is to be expected for a stuck nut.

I use anti-seize on the lug threads occasionally. NOT the coned faces of the nuts and wheel but the threads. (My lawyer is aghast that I posted this in public. So don't do it. I died from it a couple of times last year. Probably will die from it a few times this year as well.)

+1 on the Kroil, PB Blaster is about as good and a little easier to find.

I also use anti-seize on the lug threads and haven't lost a wheel yet, but read unimogbert's disclaimer above.