I was thinking it would be nice to have a separate tool kit just for my XJ8, and possibly one I could bring along with me in case of need- Here is what I can come up with off the top of my head:
ratchet and extention(s) recommend 2 short one medium
Wobble extension (short)
Small spark plug socket
19mm socket/wrench
18mm socket/wrench
17mm socket/wrench
14mm socket/wrench
13mm Socket/wrench
10mm socket/wrench
8mm socket/wrench
Flat and phillips screwdriver Medium size
Torx 25/45

Please add to the list as you see fit!

 

Aside from the torx bits, just go out and buy one of the medium size Craftsman metric sets. You'll save a lot of money over buying individual pieces. Additionally, some of them come with a blow molded plastic case for storage in your trunk.

 

Hose clip tool
OBDII reader
Spray lube like WD40
Multi meter
Torch
plastic trim removal tool
role of tape
Merc trans dipstick tool (4 R's)
flex magnet

I've a kit like plums suggested along with a flight case with odds and sods in that can tackle most jobs.

 

For the truly ambitious, a folded towel with pockets sewn into it makes a great custom tool roll that is compact, protects tools from scratches, and prevents tools from making clinking noises.

Those who are into flash can substitute chamois as the material of choice

 

Make sure your spark plug socket has a grabber insert, then lubricate it with silicone grease otherwise the damned thing pulls off the extension and stays stuck to the spark plug.

 

Duct tape and a BF hammer. The Jeff Foxworthy tool kit.

 

I used to carry a toolkit in my cars way, way back. It ended up that I never used it and was carrying extra weight around so now I only carry rubber gloves, jumper cables, spare gas and my AAA card.

I once read how much fuel it cost the airlines to carry a can of soda around for a year and it was some crazy high amount. It does add up, and I'm removing as much stuff from my car as I can.

It might not seem like much to remove the rear headrests, the CD player in the trunk and light items like that, but even a land yacht car drives differently with a passenger as opposed to without, so if I can ditch 150 lbs of stuff I don't need it would be like not having a passenger.

I haven't changed a spare tire in 20 years and really question if it's worth it to carry a spare tire and jack. If I have a flat I'm phoning AAA. Those items weigh a lot. The spare tire is insane heavy. I'm guessing I could knock 200 lbs off of my car.

If it's significant I could get the car reweighed and pay less for my vehicle registration.

dsnyder586 (Dee Snider?) the pic of your car looks like you have a hood scoop... my first thought was that it was Texas style - an actual mailbox with the flag still on it. That would be nice on a Jag.

 

Ian, I agree it's pointless hauling a kit around, but when helping another brother with an XJ it's a go-to item. My XJ8 kit weighs in around 40lbs, that's packlunch to some people, and barring engine swaps it'll tackle most jobs. It stays at home on a Snap-On tool waiter.

What I would suggest is a proper wheel nut extending wrench, every XJ8 I've seen their's is bend at the neck, like it's been fabricated from liquorice. I bought one that fits perfectly where the original went, Teng Tools, about Ł25. I know I'll be able to change a tire if caught, not swear and curse at Jaguar for supplying the car with a crap tool...

 

Sean....it's not so much Jaguar supplying a crap tool but more downm to Gorilla fisted morons who tighten wheel/lug nuts to 200 ft/lbs instesd of the 80! ;o

 

Then again, a 1/2" drive breaker bar is more versatile. Just keep the one socket needed for tire changes on the breaker bar when carried in the trunk. The other sockets can stay home until needed.

 

Nice tip!