New personal record.
Trip stats.
75hp 1.4 TDI, not reprogrammed. Box stock standard car.
Started recording as I was at my cruising speed on the motorway, and engine warmed up (i.e. fuel consumption not measured to bring the car up to cruising speed).
Cruising at steady 80km/h speed (i.e. 49MPH).
Solo effort, I was not trailing larger vehicles.
Tyres; winter season non-studded CONTINENTAL friction tyres, 175/65-15, inflated to 3,2bar (47PSI). The tyres were on their last stretch, contact surface almost completely worn off, which helped to achieve minimum tyre flex on contact layer, hence improving tyre rolling ability.
Cargo; me and Mrs, our dog, and weekend's worth of stuff in the car plus stereo speakers we picked up on the way (all totalling maybe about 205kg/450 lbs).
Measured distance, 100,4km, 62,4miles.
I was at 89.9mpg as I let the car to roll free onto the off ramp I had to take. During that quarter of a mile free rolling, my overall mpg broke into the 90's.
UK MPG 90,2
3,1 L/100km
I have spent 5 months dialling in Android (Torque) software to have fuel consumption measurements as close to reality as I am capable. I am within 0,1 liters/100km. However gallons to mile is more sensitive measurement table. I can have MPG to change several digits while liters per 100 km remains the same, hence my real fuel consumption can be something in between 89mpg to 91 mpg.