Can't seem to break the 60 mpg barrier

[malibuguy]

I drive 90miles a day. Back when I cared I had several tanks in the 54s and thats with awesome maryland traffic and using ac along with several traffic lights and plenty of uphill stuff. Running only 38psi in your tires is childs play. I run 54psi.

I think p&g does not work so well. I normally run a modified version of that when I can. One leg of road if I time it right (vary rare with typical traffic) I "pulse" up to 60mph and can coast with the motor off for 2.7miles. Basically I do the pulse when I can coast with maximum effectiveness.

Lately ive only been getting 43-47mpg but ive been driving the balls off the car (had it up on the speed limiter this morning for example embarrassing a 2.0 sentra)

Run the tires high and also block off the upper grille. The car will still run just fine even with ac