Is saving fuel still a thing in F1?

[rcrdmcdaniel]

Hi all,

During races: Are they still using engine modes to save fuel or just to save the engines from blowing up?
Or did the whole use only so and so much fuel flow max during any time and only 100 kg of fuel during race thing go away?I haven't heard anything about fuel flow or fuel savings all season... but are they still doing economy runs basically? How much has this changed from first two years of these turbo engines?

Please help.

I did not find the right solution from the internet.

References:-
http://forums.autosport.com/topic/20692 ... ing-in-f1/
Marketing Communication Video

Thanks