Getting better than avg mpg (+10%). Something wrong?

[Raizinman]

Many factors can explain an increase or decrease in gas mileage.

1) Driving with or against the wind
2) Change of gasoline
3) Removing golf clubs and other weighty items from vehicle
4) Adding or removing passengers
5) Tires over or under inflated
6) Recent air filter replacement
7) Driving with the A/C or Defroster on
8) Road terrain now different
9) New tires
10) etc etc