Brian Winch began his journalistic career writing for the Australian Airborne magazine more years ago than I care to remember. He did engine tests (mainly a copy and paste from previous tests no matter what the engine was) and a column on the engineering side. Some of what he writes is good...some is rubbish. It's up to you to pick out the wheat from the chaff. Brian Winch is provided with all synthetic fuel for his engine tests, work that out for yourself .

There's no other oil that has castor's qualities but they can be enhanced (it's called synergy) by a blend with some synthetics. When synthetics get hot (as they do on the liner in a lean run) they revert instantly to the chemicals used to make them and it's called unzippering. That leaves the liner dry. When castor gets very hot it begins to change into another lubricant so still gives protection. At about 850F it'll burn but until then it's a lubricant (and by then your engine would have melted anyway ).