The hinges on our '98 Sub's barn doors are very stiff and difficult to open/close. It's my understanding that they had a tendency to corrode and cause this problem. Is there an easy solution or maybe a hine upgrade available?

I seen a customer once on a chev van that drilled the cetre part and put in a grease fitting,worked great.Same style of hinge.

Now that's a thought. You'd probably want to disassemble the hinge before drilling, though. Will have to take a look at that possibility.

Seems to work,they also make a neat little thread in plug for a grease fitting so you don't have to run around with a fitting hanging out.

Stay Away From Wd-40, It Attracts Way Too Much Dirt And Dust. Use A Silicon Base Lubricant. If You Want To Take It To The Next Level, I Get Great Results Lubricating, Using Syntheic Motor Oil. I Had A Left Over Quart Of Red-line Sytntheic Motor Oil And I Put In A Spray Bottle ($5 @ A Home Depot) And Sprayed Hinges, Locking Mech., Hood Hinges, Everything!!! It Makes It Way Deep Into Parts Were Greese Doesn't Get Too And It Won't Brake Down As Fast As Lubricant Sprays Or Wd-40.

That sounds like the same problem I had with a 1995 Chevy van. I solved it by putting a drop or two of 3-in-1 oil where it could wick into the hinge pins every month. After applying oil the first time, work the doors back and forth about 20 times, then apply another drop. I expect you'll see a big difference.