I am almost sure that 10w50 wont harm our RR310's engine as 10w will have just 5 units less viscosity than 15w and the only time the engine oil needs to behave as a 15w viscosity oil is at early morning starts and very cold environment temperatures (and we know how hot India is).
But I don't want TVS to get a chance of putting the blame on me if something goes wrong with the engine (very less likely). That is why I went for 300V 15w50 instead.



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