In my head, debt falls somewhere on a scale of Bad to Good, based on a couple different factors.
0-Really bad - Payday loans
2-3 Most Credit Card Debt
5- Somewhere in the Middle (I see car loans like this)
7 - Student Loans (invest in education!)
10 - Good - Loans on income producing investments
Why do I see car loans as somewhere in the middle?
1) They are necessities in much of the country
2) They are depreciating assets, so either you pay opportunity cost of deploying the capital, or you pay interest. You are loosing money either way.
3) For some people their vehicle is a business asset (like a pickup for a construction guy, or a nice SUV for a Realtor) that earns money
I look at it this way, I get a house for 20k down that will pay me $200/month cash flow in perpetuity, and when that loan is paid off I have the house that has appreciated.
I pay only 1-2k for transaction costs to buy a (20k) car and pay ~$300/month loan payment. Net cash out $100/month.
At the end of my 5 year period, I have a car worth say $12000 for easy numbers, that I've only paid (100*12*5+1.5) $7500 for. And I have a house I've built equity in.
(And you might even be able to get it under the RE business so you are paying pre-tax, not post-tax dollars for added benefit)
Now CC debt for "doodads" is a totally different story. I would rate those a 2-3 depending on what the "doodad" was or if it was really necessary or not.
Whether you feel psychologically inclined to pay that down or not, the numbers work less in the favor of paying off your car loan than perhaps other debt types. My personal take is that once I get my CCs down, I plan on buying a house that will fund a new car loan, and have that car in the business to pay pre-tax money for it.