What grade Octane should we use

[King Asoka]

I saw Duesergirl's post about what grade gasoline she should use in her 2.4. I thought it might be a good idea to discuss what everyone uses in there tank and why. Give your view of the pros and cons.

Im burning 92 octane in my 3.4L. (In Canada Chevron sells gas with 87,89,92,94 octane levels) I find i get better mileage at the higher octane level. I havent tried the highest octane gas yet, and i dont think i will bother unless i get some serious engine mods done. I also think it burns a little cleaner the higher you go, but that, im sure is debatable. I also find i get less engine knock. Im definatly no expert when it comes to this stuff. So I cant wait to hear what you guys have to say.