Hi there,
after some modifications (upper grill block, change from summer to winter tires (235/55=>215/60) and pressure on winter tires at 3.7 atm, my mpg on my
morning commute came up from about 50 mpg best case to an unbelievable 57.36 mpg (4,1 L/100km) this morning. Tailwind was about 10 km/h (if you believe what the weather service says). Um. Best commute before that was 53 mpg (4,4 L/100km), and sometimes I had stronger tailwinds... well. I am far from complaining :-)
so long,
tinduck