at motorways speeds (outside lane) it still returns 45mpg.
the main factor is the right foot - if i use 50% throttle it is still quicker than most small engined ptrol cars with ease, it is when i use all that loud pedel i see the economy drop. Worst i ever saw was 36mpg.
Until i get the issues fixed i am going to limit myself to 75% throttle i think so should still get 40mpg out it 
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Mods Fitted
Pipercross Filter; Full 2.5" 'Wingy' exhaust; Donny Custom Turbo outlet pipe; Custom injectors;
Uprated gearbox bearings; Helix Clutch; Quaife ATB; Upgraded clutch Hydraulics; FMIC; Ported Head; ARP headstuds; Leda coilovers; 'Brembodge' 326mm disks/DS2500 pads
Dieselpowered
Fitting Custom Hybrid Turbo (1856GTBv) & controller; Remap, swirlpot, lift pump
AMW Motorsports
Custom exhaust manifold & downpipe
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