they run 3.7 diff vl only run 3.08 so a vl should get better ecconomy
No necessarily. Maybe going for long highway trips but not around town.
I also agree, I have never seen an RB30 with good fuel consumption. Ususally they are between 12-15l per 100km this is not cool condsidering the VL only weighs around 1250kg dry.
They also feel extremely sluggish like Mr.shin suggests. You feel like winding the window down and hitting the engine with a wip