I've done take downs after running 36" 404 on 661's for generally 8-15 tanks on the following oils:
red armor x 2
honda hp2 x 3
mobil 1 x 3
Belray Si-7
Amsoil saber
Klotz original techniplate x 2
Klotz super techniplate
Belray H1R
Schaeffers 7000 x 3
Schaeffers 9000 x 2
Dumonde
Yamalube 2R
Motul 800
IMO Nothing has been cleaner than schaeffers.
I've seen the inside of scott's 440 and 64/66. The 440 has over 1000 gallons of gas (schaeffers 7000 32:1). And it still looks cleaner inside then any of the others mentioned above after only a couple of gallons of gas.
You can talk smell, cost, color, msds, theories all day long. But the 7000 is the cleanest. It's thin so yeah I'd run 32:1.
If you want I will start PM'ing you pictures of every take down I have done.
All that said I still feel the best way to determine the best out is to do the oil test I want to do.