UltimateG said:
*Add some gas stabilizer to 1/4 tank of quality fuel
Add some fuel stabiliser to a completely full tank (i.e., fill it as far up the neck as is reasonable). This will help to prevent condensation and rust - if there's nothing for it to collect on, it can't happen.
*Check to see that the air filter is intact
Definitely. Also plug the intake at both the suction end and throttle body. Old socks work great for this.
*spray some WD-40 into the cylinders when I park it.
Never heard of doing this before on a healthy vehicle - but do change the oil and filter, and add something along the lines of
Lucas Oil Stabiliser first, being sure to give it a good run with that in the crankcase before parking it. In fact, do this 100 miles or so before the fuel treatment. Expect mayonnaise on the oil filler after recomissioning, though - condensation will collect in the oil pathways, but it's not necessarily indicative of a blown head gasket. Clean it off and give it fresh oil and you should be OK.
And clean both sets of terminals once they're off. Don't necessarily expect the battery to work once you come back to it, though. Coat them in Vaseline to prevent rust.
OK, your profile says you're up in Tahoe. It's May now, so storing a car for eight months means that you won't get to it until somewhere in January or February - four months of summer followed by four months of winter until it runs again.
Get as much moisture out of the cabin as possible. Run with the heater on full and windows down wherever possible to achieve this; the last thing you want to come back to is an XJ full of mould. Make sure that your seals are good - if they aren't, you'll have the same mould problem while it's parked fom ambient dampness. If in any doubt, spray the interior down with Lysol when it's garage time.
Change all fluids before you recomission it, but make sure the antifreeze is up to the job before parking the beast.
Spray off any road/trail dirt, both underneath and on the body. This will help to keep rust (which never sleeps) at bay. Grind down and at least primer any existing rust patches.
Also, I have a cover to throw over it, are these things okay to leave untouched on the jeep for extended periods.
Here's the model:
http://www.jnkproducts.com/200_carcover.htm
There're two schools of thought on car covers: a) they're the best thing since sliced salami; b) they're moisture traps at best.
I've never covered any of my vehicles, all of which have lived outside. IMHO covers are rust and mould/mildew traps, but YMMV. Bear in mind that while they're good at keeping surface threats at bay, they also trap a lot of stuff under themselves. Again, YMMV, but I've never been much of a fan of them.