Jessica,
I'd advise you just forget the money for an oli analysis, and instead have the SO do an oil change with some WalMart Shell Rotella 5w-40 Synthetic oil in the 1 gallon Blue bottle. You'll need a gallon and a quart at least for your 2002 Jetta and an oil filter that runs about $11.00 or so.
The gallon of oil is 14 to $15, another $4 for the quart and 11 for the filter, plus whatever sales tax you have . Bring it all to a GTG and ask around if someone has a Pella oil extractor to bring it to th GTG.
The money you spend on oil analysis is unneccesary in your case, you just need to get your oil changed since your MPG was so poor, it loaded up your oil with soot.
Now that your intake manifold is clean, do your oil and filter too. And get someone with a VAGCOM to set your EGR to the minimum, like I Pm'd you, to keep your manifold clean.
Good luck and let us know how it turns out, I wouldn't miss the GTG to get your car sorted out, especially the oil and filter, you have no idea how long it's been running in that condition. Best to spend a little $ and start fresh, knowing you are doing your car a favor that will benefit it's longevity, instead of having any doubt about it.
Oil analysis is for folks with money to burn that are compulsive about the well being of the innards of their engine. It's provides usefulness to Fleet Managers, with Big Rigs, but for a car, it's a waste of money. Service the oil and filter, and the car will last long after you've tired of it and sold it to the next guy in 3 to 5 years.