What tire pressure do you run?
 

I've been running at the pressures on the data plate (39 all around if I recall). The ride seems really harsh to me. Tires are Michelin Latitude Tour HP 255-18 no-seasons. (Which, by the way, absolutely suck in snow, slush and ice). I have the sport suspension, so I expect it to be firm, but it just seems a bit rough.

I'll probably play around with reducing the pressures a couple pounds to see if it helps but I was curious what others are doing.

Follow the plate on the door, 32/33 psi cold, as best I recall, for my 18" 255s [Conti DWS in winter, Cooper Zeon summers]. If you are running 39 psi, that and the tire type might explain it.

I go with 35psi all around.

Running 35psi front and 38psi rear.

My plate says 33 front and 39 rear. '04 4.8is That's what I'm running too

32 front and rear. Increased to 35 rear when fully loaded (4 people plus luggage, or equivalent luggage load).

Looking at the 2006 owner's manual (the 2004 manual won't load) I see 32/33 all around, even with a full load. the 39/39 figures listed are for four people plus luggage, only when travelling at sustained speeds in excess of 100 mpg. Even at those speeds with four people, it calls for 32/32.

Here's a pic

Here's another pic showing the distinction between cruising under 100 mph and cruising over 100 mph.

I usually follow the plate on the door .

32F/38R here

I have noticed faster center tire wear in the rears. Thinking of moving to 32/35.

Besides the one or two posted here, what PSI are you owners of the 4.6 and 4.8 running?