I just got my first Excursion 4 days ago and I'm loving it so far. It drives so much better than my ex. cab 250 did. My question is what PSI do you guys run in stock 265 size tires. I was thinking 80 because of fuel milage and the truck weight of 7190 pounds. But I know that my 250 rode a lot better at 65 all the way around. Thanks.