Late to change Engine Oil

Hi Members,

Mine is a 2013 with 130K Kilometers (about 80K Miles).

I have almost always changed the 0W-20 engine oil and filter every 6 months or 5K Kilometers, whichever had come first in the last 5 years. This time, I haven't changed it yet nearing 8 months partially because the car has run less - still around 4.5K Kilometers and partially because I have been away. I am using Havoline 0W-20 from Caltex.

I am about to replace the oil and filter with the same brand in a couple of weeks. Is there anything else like flushing the engine that I should better do because the oil change cycle has been delayed by at least two months from the recommendation?

One thing to note, the average moving speed is terribly slow here because of the heavy traffic. Just to give an idea, the average speed in these 4.5K Kilometers has been around 12 Kilometers per Hour. So, the engine always needs to idle a lot in slow-moving traffic.