This is my experience with my RB26DETT Vspec 33,
Stage 1 mods
(Preprogrammed Japanese ECU, fuel regulator, after market Intercooler,
Aif filter, BOV, 3" exhaust piping, muffler etc..)
Full tank of Fuel: Shell V power = RM 80.00, Shell normal = RM 70.00
With 17" Wheels: 255/40/17 tyres & forged rims
Urban Driving (Klang Valley) = 260+- KM
Long Distance drive (KL to Penang): = 400+- KM
With 18" Wheels: 265/35/18 tyres & forged rims
Urban Driving (Klang Valley) = 260+- KM
Long Distance drive = Not Available (have not tried)
In my opinion, the fuel consumption of a vehicle is due to many factors.
Engine mods, type of tyres/rims to list a few. However, even tho the 18" are a little
heavier then the 17" but i have not felt the difference in fuel consumption (yet)
My previous Putra with full tank of fuel could only take me 180 KM max!!
This is due to the fact that the engine was heavily modded
(Programmable ECU, Large Pistons, Biger Turbo, Bigger fuel pump, after market injectors, etc)
Stock RB26DETT would prolly take you 300KM I would say