It's semantics. Obviously the lube is reducing friction enough to lower pressures and wreck burning rate. Until the new lube there was no issue. May have been one looming, but with zero extra space in the case, lack of friction could easily drop initial pressures enough to ruin the load. My guess is that the goo is a really good lubricant in and of itself, and that castor oil is way overdoing it. Mineral oil too, but it is already too late. How about Flowmaster and goo and soap? Thick enough (maybe not)?