Hi Ganapati, 
 
I've used these two oils: Singer oil and Western Australia Sandalwood (Santalum Spicatum 100% pure). So far it is still reasonable since my collection is small (less than 10) and I've only used 10-12 drops to be mixed with the Singer oil. 
 
Best Regards, 
 
YS
		 
		
		
		
			
		
		
		
		
		
		
		
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