Supertigre suggests using a fuel with 15% minimum oil content flow fuel for break in. After running in the engine for at least two gallons of fuel, then one can run 10% to 12% oil content glow fuel. Whether the oil is all synthetic, all castor or a blend is not critical. There are several fuel companies that make and sell special large Supertigre engine glow fuel too.

I assume that since the engine is larger, then less ether would be needed as the engine can contain the heat better with less heat loss and it has more volume to compress. Oil content in the fuel is likely similar to the glow fuel. But since it is a diesel then running a little more oil shouldn't be a problem or hurt anything. Since it has a bronze bushed connecting rod I would tend to err on the conservative side myself.