My Dad has the dual cab 4wd 3.0L Diesel Hiluxx (not SR5) with the aftermarket 115L ARB tank, a snorkel, steel ARB bullbar (with foggies), canopy, dual battery kit, aluminium side skirts, rear steel tow bar (just to demonstrate the weight factor)
He reckons the best he has done is 1050KM and his average is somewhere between 8.5-9.0KM per L... Although my dad drives it like an old man
Yours is roughly 6.0KM per L which is not too good, what sought of driving do you do and is there anything very heavy on their e.g. a winch?
alloy bull bar and spotties
side steps
canopy
tray liner
h/d tow bar
CB radio LOL
And I can drive it really gentle but it doesn't seem to make any difference. turbo conversion is coming real soon me thinks with a dyno tune....
Nah nothing really stands out there as particularly heavy, she might just need a good tune!