Top up oil

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Joined
Aug 28, 2014
Messages
20
Reaction score
0
Location
Joburg
Bike
BMW R1200GS Adventure
Hi guys, always used 15w40 oil in my 2011GSA. Am down in Durbs from Joburg and want to top up the oil. My old man has 10w50 fully synthetic castrol. Can I top up my bike with it or should I get off my backside and get 15W40?
 
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