My GIAC X chip is actually configureable using my VAG-COM software.

However, given that they are the engineers who spent hundreds of hours tuning this and I sell auto insurace, I'm going to pretty much leave it alone, haha. I just log to make sure everything is running as it should.

As for the Seafoam, trust me, I'm not expecting a night/day difference - I just want a nice, clean start with the engine. It's been drivin for 9 years and 139K now so I'm sure there are some unhealthy deposits built up inside, that's all.