That's the recommended oil from castrol. It will be fine.   Colour is no issue as its a dye put in.  The fuss with them is people don't put a recommended oil in them and it doesn't work with the clutch plates.  Mineral based oils won't work in this box, must be a synthetic dex3. Transmax z meets and exceeds this standard.  I have used valvoline maxlife in them with no issues.  It's red but is the same grade as transmax z
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				It doesn't leak oil, Its sweating power
			
			
		 
	
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