This is an easy one!
Powerplus Castor/Synthetic is the best smelling, safest stuff around, bar none!
It is the safest, sweetest smelling two stroke oil around, but not very well known. It costs $5.00 for twelve ounces and is made to mix at 50 to 1. Manhatten oil in CA sells it. You can call them at (310) 372-9041.
The oil smells like burnt race gas even though you are using only pump gas. It burns clean and offers protection second to none! No engine wear here, even on my super hopped up Banshee. I also use it in my son's Blaster injection bottle. No residue here. Don't use their 100% synthetic. Go with the Synthetic/Castrol blend.
It is the most popular stuff in the Phoenix, Az area (where the hotest tempartures exists).
I use nothing else! Power Plus rocks! When you call, use my name, Rob in Phoenix Az. Tell them to begin advertising on ATVing Powersports Mall so everyone has a chance to get it and not just us in the Phoenix area.
Klotz smell good, but ruins your engine due to its breakdown at high temps. Castrol sucks unless you like high residue/build up in your engine. Don't waste your time on all the others (golden spectro, maxim, yamalube (yuk) WB40, Klotz, Castrol anything, Polaris Gold, etc.)
Take it from an experienced rider in hot temperatures......Power Plus Castrol/Synthetic si the best!