You know what is annoying, if you go to the dealer and by one gallon of anti-freeze, it says in bold letters good for only 60,000 miles. Yet your owners manual says 120K. What gives? I didn't know this prior to changing it, which is a very simple job by the way. My goal was to be a little over zelous and do the preventative maintenance sooner in the hopes to avoid any future problems, since I'm racking up miles like crazy.

As far as the spark plugs, are you really going to have to change all 6? I doubt it. I'll bet you'll find that the front plugs look far better than the rear plugs since, to my understanding, it's the back three that are running in eco mode. (which figures since they are the hardest to get too)

On the break fluid I'll agree with daddywags that I've never changed break fluid or have noticed any problems that stem from it. However, everyone I've talked to has stated that break fluid absorbs moisture, which probably will eventually affect the performance of the ABS system. Since those components are extremely expensive compared to $50-110 for a break fluid flush every 3 years is a small price to pay.

On a side note, I have also changed the trans fluid already (with castrol brand). It was fairly simple too. (just a fluid change not a flush) I'm planning to change the fluid again this spring sometime with Amsoil full synthetic. I know I won't get a 100% change of the oil, but it will be close. Personally I don't have any faith that a trans flush is safe. With clean fluid and a clean magnet a trans will work itself clean over time.