For no good reason, we’ll pick the period around 2000 BCE. Somehow, you are transported to Egypt in your fully loaded Jeep Wrangler. Thanks to your Babelfish, communication with the Egyptians is no problem. You have a full tank of gas but no more. What do you do with your Jeep? Do you try to trade it to Pharaoh (or someone of similar stature) or do you keep it? If you decide to trade it, what do you think you’ll be able to get for it? If you keep it, what are you going to do with it?
I wonder if it would run on alcohol? Find that out first.
Even if I could get it to run on some kind of alternative fuel – and that’s a big if – the Jeep is not going to last more than a handful of years before something breaks or wears out that I cannot replace. So I’m gonna show the Pharoah what it can do, and then trade it for some camels and a couple herds of sheep and goats, and some fertile land.
I’m pretty sure Pharaoh would just take it. And me, too. One does not “trade” with a living god.
Do you have any idea what the trade-in value of a car -4000 years old is?
If it runs on diesel you would have some luck running it on homemade biofuel (that is if your fuel doesn’t eventually junk up the engine).
Wasn’t Egypt polytheistic? Surely with a Jeep you could convince Pharaoh that you were a god too.
I believe that “flex-fuel” E-85 Jeep Wranglers have been made. You might be able to get almost two tanks out of it by running the Jeep down to 15% full and then dump in moonshine. It might even run on pure hydrous ethanol - I understand that one of the reasons for having some gas is that engines have trouble cold starting on pure ethanol - probably not as big a problem in Egypt as it is in Colorado, but possibly an issue in the dead of winter, though you might be able to rig up some glow plugs or just start a fire underneath the car to heat the engine. How easy is it to mod a car designed to run on E-85 to one running on ethanol?
Also, think about where you are. You’re not far away from one of the biggest oil deposits in the world. There’s plenty of them thar oil over in Arabia, but can you extract and refine it?
If that works, you can get six tanks by siphoning out the gas first and then mixing the fuel. Assuming you have something to store gasoline in. Glazed ceramic pots with lids should work. Did the Egyptians have those?
After you run out of gas and/or something breaks, you can still yank out the drivetrain out and use it as an armored chariot. You’d probably want to scavenge the front end sheet metal to armor the various exposed bits, but after that you’ve got a steel-encased tank that should be impervious to most bronze-age weaponry and yet light enough for a few horses to pull. Unfortunately 2000 BC is just a little to early for the horse in Egypt, but park it for a few centuries.
Although I wonder if you could even do any work on the thing at all without modern tools. I imagine there’s going to be a lot of trips to the Sears-o-hotep to replace broken bronze wrenches. However, beer HAS been invented so at least you can slam down a few cold… er… warm ones while you’re not fixing your jeep.
Hmmm…tell the Pharoah that to reward him for his wise and beneficial rule, the other gods have sent you as a seer to gift him with more knowledge to keep his armies and cities strong? Then explain the Jeep as being how you traveled to this realm, but that it was a one-way trip.
Then you’d hopefully have a receptive audience for introducing some futuristic technology and ideas, along with knowledge of upcoming events in the near-future.
I would probaby use its functional life to awe the populace with donuts and sweet jumps off sand dunes. To an ancient egyptian, a jeep must look very bizarre- an oddly colored chariot with fat black wheels, pulled by invisible beasts making terrible bellowing sound.
I would try and impress enough engineers/scholars of the time to trade the secrets of my chariot- that the gods demand offerings of spirits of a specific mixture to allow us to continue use of their spiritual beasts. When it finally irrepairably breaks down, I would explain the egyptians have lost favor with the gods, and they took the invisible beasts back- but perhaps we could change their minds my studying the chariot. Im sure even ancient egyptians could learn a lot about gears, iron, etc by studying the guts of the jeep. I would eventually give the gutted- out body as an offering to the local pharoh, imploring him to get his people to work on offerings (with my wisdom, of course).
Just imagining a pharoh crusing along in a camel-towed jeep wrangler, the key adorned as a protective pendant around his neck, as pretty hilarious. 
Well if I only have a tank of gas, I can’t go very far or do very much with it. When the fuel runs out, which won’t be before long, I’ll be like everyone else, except with a 3,500 lb pile of metal and rubber next to me. I reckon I’ll not tell them that the thing won’t drive forever, sell it for endless quantities of whatever the most awesome ancient Egyptian shit there is so I can live the most asskickingest life possible, and have a good time.
Although once the gas runs out, they’ll probably come after to me to know what the deal is, and the Pharaoh may be none too pleased… Hmm, maybe I need to think this through further.
Once it runs out of gas, could you turn the engine with some sort of alternative power, like water or slaves? You couldn’t drive it, but you might get the air conditioning and cd player to work! That should impress the Egyptian babes.
Does it have On-Star?
A white chick suddenly transplanted into ancient Egypt with a temporarily-working vehicle? I’m revving the fuck over the nearest cliff.
Nothing but desert. You will be raped.
Could I use the jeep to fashion a cliff out of sand?
Hmm… what knowledge? ‘You know that Cleopatra chick, well she’s going to… What d’you mean you’ve never heard of her? Aw crap, 400 years too early. Um, well, you’re going to have a pharoah called duckheadsquigglesheafofwheat in about 50 -80 years, unless that was last dynasty?’
Unless your Egyptian knowlege is a damn sight better than mine, of course. 
I’d probably try to set myself up as a goddess -manifesting with mysterious inexplicable chariot clad in bizarre costume should be enough for that- get a garage made for the jeep to keep the dust out, and only fire it up on major occasions, while I could still keep it going. I don’t think I’d last 10 minutes as a general Egyptian woman, but I reckon I could keep going that way for quite a while with appropriate mysticism.
I take my Jeep to BFE all the time! Sometimes, it even gets me back.
Everyone’s so focused on using distilled alcohol to power the Jeep. I think that the distilled alcohol will be worth a fortune as a trade good whether or not you can power the Jeep.