QP, Nice mower! Us BITOG'ers think alike as I did the same thing! I purchased a new Toro at the end of '07, ran the FF about 5x dumped it for GC in early '08, changed it again at the end of '08.
I wonder how long the mower will last with only running GC in it? My son will give it to his kids! LOL
Sort of off topic but what's the logic in rating mowers by their torque these days? Do they tell you at what rpm it makes 6.75 ft lbs? It would make the old 2 strokes look bad as their hp was up higher but they aren't sold anymore I think?
I have a 25 year old lawn boy, not the commercial grade one but it seems built pretty well! Has yours needed the engine opened up yet? Mine hasn't so far.