RE: Synthetic oils soluble in methanol besides klotz?
I've been using all castor for a little over a year and I've had my engines running far better than ever before. They tune like a dream and the exhaust smells nicer. I was merely looking to experiment a little, but probably not a lot since klotz is 2-3 times the cost of my SIG castor.
If it costs more than $7-8/quart it isn't cost effective for me to use much of it. I would probably use 85% castor and 15% synthetic only for carbon control.