Fuel consumption after weight reduction

[h3ll]

Hello, I would like to hear your opinion on this.
I've read that after swapping v8 in lighter cars MPG slightly increases, so if I am about to cut ~200kg of my ls400 should i expect better MPG? I do custom fiberglass and carbon parts myself and I wonder if it's worth my time.

 

[coupekiwi]

Yes, it's true.

You will get better MPG.

But you can change your driving style a lot to achieve the same results without spending hours making panels. Things like keeping the tires pumped up helps too.