using drug store castor oil?
I couldn't find anything on t his subject so I thought I'd ask. Is it ok to use drug store castor oil as an additive in glow fuel? I've been adding 2oz castor to a gallon of Morgan 15% and I was wondering if it was doing any good or harm? I am getting burn marks around the muffler that I didn't get before so I know it's burning it up.