F1 tech questions

I know how tire pressure can make a difference on th track cars, but F1 cars don't use regular O2 in their tires right? Also, don't they run a really low pressure? Can't remember where I heard that, so don't hold me to it.

On a side note, is it just me or is the Scuderia using a darker red then last year?

 

nm, just saw the other thread...