A car of this vintage with the stated miles should not be producing blue smoke. If valve seals are the problem, then take it back to the dealer and get a solid diagnosis. This should be covered by warranty. If the return holes are partially obstructed (for whatever reason), this is also an issue for the dealer. The way I see it, they own the fix on this one..
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.