Change your oil again. NOW!!! If you're going to switch oil, rather than changing weight, switch to synthetic. The "better cleaning properties" might help some.
About 6 months after my UIM went, I lost the whole engine. Apparently, the repair was not done soon enough, and the coolant that got into the system had time to start it'* evil rot trick. The engine basically ate itself due to internal rust for about 6 months, and finally blew (taking the tranny out with it)
Get some good clean oil in there quick! Not sure how much it will help, but it can't hurt to get out whatever left over contaminants might still be in there.
Good luck, mn. I hope I am over reacting based on my own bad luck.
1998 SE Midnight Blue Pearl
Gutted airbox, FRAM AirHog, removed MAF Screen, eBay clear corners, extended brake lights
I'm so much cooler online