20:1 is for chainsaws and wheedwhackers.;)
I'd agree...your dealer doesn't have a clue!
Check this out:
http://www.maximausa.com/
Click on <products><two-stroke><super-m> to see:
Usage
Super-M is ideally suited as a premix with pump or race gasoline in virtually all high performance and racing 2-cycle engines.
Recommended Premix Ratios
50-80cc (24-32:1) 125cc (24-40:1) 250cc (24-40:1)
500cc and up (32-60:1)
A point of view from an oil manufacturer...for what it's worth.
Keep in mind that LESS oil (changing from 40:1 to 50:1 for example) is RICHER (more gas) air/fuel-wise. Don't confuse the two: premix ratio and lean/rich air-fuel ratio.
What better way to 'convince' riders that the oil
YOUmake is indeed special than to 'recommend' it be mixed at 100:1?
Wow! It must be GOOD!!
Gee..imagine what a rocket you'd have if you used such an oil
AND a splitfire plug!! Geez-o-pete-wow!! ;)
Golden Spectro is a known BAD carbon buildup oil.
RE: oil by the gallon.
Do yourself a favor. Buy a quart of premium oil, drain your gas tank of the 'by-the-gallon' stuff, compare your bike's performance 'tween the two.
I'd bet you could tell a big difference. If you can't???...then it don't matter. (that's not an opinion on what oil to use, btw)