How much of an increase in mpg can I expect with overinflated tires?

[jadziasman]

For the first time ever I overinflated all four tires on my VX today. I put 45 psi in the front tires and 40 psi in the rear tires. I have always run 30 - 35 psi never going over 35.

Do the other overinflaters in this org have pre and post mpg data that shows let's say a 2 - 5 % increase? For my car that would translate to 1 to 2 extra mpg. I'm just asking because I will probably need to check tire pressure weekly to maintain the "high" pressure. I don't check nearly that often now.

I didn't notice any handling difference on dry pavement today at 60 mph. Cornering felt a little weird but it didn't feel unsafe.

My goal is to achieve 50 mpg average through a variety of techniques - this one being the first.