Until recently, I always thought 10k was the norm .The car shop say you should get at least 20k km. I mentioned to him, I have never obtained more than 10k km. Always botak by then.
I think it is because the CH-simpang pulai and the EWHW road I always use. I think I drive normal. Slow into corner, then accelerate fast (say 5-6k RPM) out of corner. That is what GT5 and F1 drivers tell you to do. Brake wherever necessary.    Always slow in, fast out. Also, inclination roads are driven about 110k km.

That was for a Honda Accord. Normal people can get from KB-KL in 3/4 tank. I need 2x full tanks. Even my previous Savvy also cannot get more than 10k km on set of tyres. Best record KB-Penang Island 4 hours flat in Savvy. Doubt I can do any faster regardless of car via EWHW.

I did manage to trigger the hazard lights on my SS under 40 km That might be the problem there. Actually I don't drive fast like a lunatic, never more than 130km, only that I appreciate quick acceleration out of corner. You will be amaze how much time saved using the slow in-fast out method rather than attack and sudden brake at corner.

I need some help with the fuel consumption here, not getting less than 10L/100km even on a highway drive is insane!

With such max speed, how to get very good fuel economy? Stay 90 km/h.

120-130 is too fast if fuel economy is a top priority.

I have driven my Preve over different cruising speed pattern and found that it's best to stay 70-80km/h. My personal best is 7.2L/100KM (13.8KM/L) on a full tank, with KL city traffic.