Google has plenty;
The Biggest Advantages
Castor oil will not carbonize at high temperatures (over 700F)
Castor oil has a high film strength, which helps prevent metal-to-metal contact between points on an engine. This makes castor motor oil an excellent racing lubricant for high-performance engines.
Castor oil does not “adapt” to its surroundings. Meaning, it stays in its current form regardless of climate, temperature, location, etc.
Castor oil has a natural attraction to heat, which means that it will actively seek out the hottest spots in an engine.
Castor oil puts off an incredible smell, one that has acquired considerable fame ever since the first use in the early 20th century.
The Biggest Disadvantages
Castor motor oil is well known for leaving large “gunk” deposits behind on engine parts.
In premium fuel, castor oil may separate from the fuel in low temperatures.
Oil injection systems cannot be used with castor oil.
While castor oil may have lost some of its prestige over the past few decades, it is still prominent and widely used today by motocross and enduro riders due to its high film strength. Regardless of what the future holds for the use of castor oil in motors, there is no denying the critical role it has played over the years in the world of combustion engines. The fact that castor oil still around is a testament to the impact it’s had on the industry.
I have always run Maxima (nothing like the smell of Maxima in the morning) is my race jet skis, but only in 2 stroke use. I've never heard of issues of switching, and a water cooled 2 stroke has much tighter controls on temperature. Perhaps they (caster) are better in some uses ? (air cooled ?).
You can spend your lifetime learning about different oils, but consider any high quality oil as a good oil. I run a European double ester oil in my Italian bikes (Ducati), that are air/oil cooled and they hold an imperial gallon of oil. After building exotic European motors (Porsche/Ferrari, and others) for 40 years, I had never heard of the double ester oils until I got an Italian motorcycle. I run Rotella oils in my pickup used for towing, as it has more zinc then most others.
Do your own research and make your own decisions
desertR