Change oil/filter or leave it alone?

[Vincentacy]

I did my 1,000km servicing a month after I collected it. (oil and filter was changed)

 

I have just hit 9,000km and sent car in for 10,000km service. I know FULL SYN oil is good for 20,000km before it needs to be replaced. I told AutoFrance I want it replace at my own cost but they insist that it is a waste. What do you guys think?

 

Also, my car is already in but I was thinking if I want oil and filter change, can I get it elsewhere and send it in later?

 

What are your advises?

 

Thanks

Vincent Ang