[chuckkent]

To elaborate a little on a 35 psi tire if you interpolate the 35 to a 30 or 32 psi tire you have to drag the speeds down in the chart. Ford I know for sure used to recommend adding 4 psi to the tires for sustained driving over 75 mph. As far as driving over a 100 mph....lots of our member do that even up to 160 mph. I would strongly recommend higher tires pressures if you are going to those extremes. Again these are things different mfrs. have recommended over the years. I do not dispute for maximum comfort and reasonable traction the door sill pressure are the law. As a member who has put over a million miles on company and private cars I have experienced extra tire life and better gas mileage with the tires inflated to around 35 psi. At least in our area the tire stores will recommend 35 to extend life if that is one of your goals. If you'll notice what the tires sites recommend is that the worst thing for a tire is to be under inflated and not over.

My whole premise on oil was that in my opinion paying much more than $4 or $5 dollars a quart for oil and about the same for a filter has diminishing returns.. example $10 a quart oil is not twice as good as $5 a quart. I can sort of understand paying $100 in Australia, UK or maybe Canada for a oil change but not here in the USA. At least not yet....