Hi all. Had the s3 for around 3 months now. It currently has a full miltek turbo back exhaust, and a shark stage 2 remap. Yet I'm only getting 23 mpg and that's all motorway miles. It's a dsg gearbox but surely should be seeing more than 23mpg? ?? What can cause low mpg?? Allready checked the obvious. Recently serviced. Exhaust not blowing. Thermostat all working. Tyres correct psi and all aligned. I'm stumped. Anyone else any ideas??