I use Redline D4 which is an ATF designed for transmission use...manual transmissions that is. It is capable of providing metal protection , friction reduction, and able to operate in a moist environment. This oil is overkill, but cheaper than a bearing. It is light, about equal to a 30w engine oil. It is a synthetic and I change it every year or two. Cost is about 9.00 per qt. All you need is a few drops. It is also recommended for BMW manual transmissions where the engine is putting out 250-300bhp. This should be good enough for a turntable spindle. The problem I have with grease only or a 80/90 gear oil is that I want oil to be between the metal surfaces and if it is too thick it wont be where it should be. Jallen
