wow... I've only put 7K miles on since last may.
But I didn't notice any problems before I did my gaskets, just had some time to kill and figured I should get it done. I did get a little better MPG, but I also replaced wires/plugs.... **** I never did my front O2 yet. I've been running a drilled t-stats since I owned it, but I do notice that my car cools off alot faster when the fans kick in since I changed from dex to green peak. But I'm guessing the 5 flushes & cleaner I did helped that.