New high mpg in my CVT!!

I'm sure many of you hypermiles will not be that impressed, but I got 74 mpg the other day on my way home. Yeah!!! I was excited. I ususally average around 53 mpg. I purchased my Insight to travel in the carpool lane so my speed is usually in the 60-80 mph which doesnt get the highest mpg. The other day I was really late going home so I missed the carpool hours and having very high winds on the San Mateo bridge and drafting with the trucks I did mangage to get 74. My old high was 68