I noticed the dealer has "add-ons" on the new vechicles. One is Nitrogen in the tires-for $ 199.00 really? Ok lets take this apart. I called the welding shop- a 300cu.ft tank of nitrogen is $29.00, and that includes the price of the rental for a month. So $30.00 for 300cu.ft .A 15" x 9" tire (google) takes 4.8 cu.ft @ 30 PSI. Lets say 5 cu.ft. The way I see it you can fill 60 tires for $30.00 Thats $2.00 a tire. total $ 8.00 for you vechicle (none in donut). If that is not bad enough -come winter time the straight nitrogen expands/contracts less than compressed air. The air we breath is about 78%<> nitrogen, some oxygen,Co2, traces of what ever else. Compressing that is what usually goes in your tire. Any advantages? Dealer says (points to sign) better fuel economy, lower carbon footprint. Well the way I see it if you keep the tires aired up properly the milage should be the same. lower carbon foot print? compressed air is already around us-where is the extra carbon VS nitrogen? Anyway I got a laugh out of this. Beware least you get $200.00 added on for $8.00 worth of nitrogen. Oh I forgot they put these cheap lime green valve stem caps on in place of the black ones. Maybe that makes it all better!