BAS

Just recentily purchased Yokohama YK 580 tires for my 07 Mustang GT coupe. Size is 255/45/r18 and have mounted on SVT 9.5 inch rims. I drive the mustang as a everyday driver and live in the midwest where temps range from cold to hot during the day. Question is what air pressure should i be running on these tires for normal driving mostly highway interstate speeds 65 to 75 MPH ,?? Some of the tire installers say 30 the door plate says 32 which is for the stock size tires of 235/55 /17 tires and rims. Some guys say 35 . Tires seem to ride best at around 30 lbs cold. After highway speeds at 65 to 70 mph tire pressure gain around 2 to 3 lbs increase after 10 miles or so . Please advise also have some other questions in which i will dive into later.

BAS

Does anyone have some answers to my question on tire pressure ???