Too late, you're already in it.So if i dont see a substantial increase in efficiency im talkin a 4-5 mpg increase I will stay in my comfort zone for psi which is between 37-39 cold because in hot weather I know they will be in the mid to upper 40's.
But yeah I dont want to get into the tire psi debate but its definetly something thats always on my mind.
I run 44 in my LS. On Saturday, when the ambient temp was well north of 100F, I took her on a 55-mile highway jaunt. PSI never went over 50 hot.