Kawi,
Here's a readers digest according to me.. so you get what you pay for!
I think it would actually be difficult to find a "Bad" pre-mix oil anymore. I would look for something readily available, motorcycle specific & stick with it.
Are there any bike shops nearby? Check out what they carry, Or it may be just as easy to order in from one of the shops online.
Personally I like synthetics, and something made to be used with an engine with a power valve. (Not that it has to be...)
As far as Ratio,
It seems to be half the guys run what the oil manufacturer recommends, 10% run what they like, and the remaining 10% run what the equipment manufacturer recommends.
This is by no means a scientific study, just what it appears to me... Personally I have experimented with all kinds of stuff and ratio's. Now I just run 40:1 in everything two stroke...
Bikes,chainsaws,& weed whackers.
Now I am Old and slow, and rarely even get into 5th on my kx.
If you are hard on the engine you may need to run 32:1, the guys making big power use it, but then again they do more maintenance I think than the average trailrider...
As far as trans oil, the bike specific stuff is great, I can't afford it...I've also run everything from ATF to Heavy Duty equipment trans fluid for wet clutch tractors and synthetic 10/40 and 20/50....
I ended up with Shell Rotella T 10-40 It can be found on sale as low as $11.00 a gallon and has worked great. Every once in a while I'll run ATF for a few rides and go back to the rotella.
(the ATF is High detergent and seems to get alot more of the clutch fibers and aluminium plate junk out)
O.K., That's my readers digest. If you snoop around a bit you'll see lots of bloody noses from heated debate on these subjects....
Tuck\o/